Any suggestion why this is not working? It reaches the dc.SubmitChanges() in code behind, but the value in database is not updated
The Grid:

public object StatusData
        {
            get
            {
                return new object[]
                {
                    new object[] { "Verified"},
                    new object[] { "Not Verified"}
                };
            }
        }

<ext:GridPanel
                            ID="FilesGrid"
                            runat="server"
                            Title="Files"
                            Flex="6"
                            Region="Center"                           
                            >
                            <Tools>
                                <ext:Tool Type="Refresh" Handler="#{FilesStore}.reload();" ToolTip="Refresh files" /> 
                            </Tools>
                            <Store>
                                <ext:Store ID="FilesStore" runat="server" OnReadData="FilesStore_ReadData"  >
                                    <Model>
                                        <ext:Model runat="server">
                                            <Fields>
                                                <ext:ModelField Name="ID" Type="Int"/>
                                                <ext:ModelField Name="status" />
                                                <ext:ModelField Name="type" />
                                                <ext:ModelField Name="title" Type="String" />                                                
                                            </Fields>
                                        </ext:Model>
                                    </Model>
                                </ext:Store>
                            </Store>
                            <ColumnModel runat="server">
                                <Columns>
                                    <ext:Column ID="Column3"
                                        runat="server"
                                        Text="ID"
                                        DataIndex="ID"
                                        Flex="1">
                                        <Filter>
                                            <ext:NumberFilter />
                                        </Filter>
                                    </ext:Column>
                                    <ext:Column ID="Column1"
                                        runat="server"
                                        Text="Status"
                                        DataIndex="status"
                                        Flex="1">
                                        <Filter>
                                            <ext:StringFilter />
                                        </Filter>
                                        <Editor>
                                            <ext:ComboBox
                                                ID="cmbStatus"
                                                runat="server"
                                                Editable="false"
                                                DisplayField="status"
                                                ValueField="status">
                                                <Store>
                                                    <ext:Store runat="server" Data="<%# StatusData %>" AutoDataBind="true">
                                                        <Model>
                                                            <ext:Model ID="Model2" runat="server">
                                                                <Fields>
                                                                    <ext:ModelField Name="status" />
                                                                </Fields>
                                                            </ext:Model>
                                                        </Model>
                                                    </ext:Store>
                                                </Store>
                                            </ext:ComboBox>
                                        </Editor>
                                    </ext:Column>
                                    <ext:Column
                                        runat="server"
                                        Text="Type"
                                        DataIndex="type"
                                        Flex="1"
                                        >
                                        <Filter>
                                            <ext:StringFilter />
                                        </Filter>
                                        <Editor>
                                            <ext:ComboBox
                                                ID="cmbTypeEd"
                                                runat="server"
                                                Editable="false"
                                                DisplayField="type"
                                                ValueField="type">
                                                <Store>
                                                    <ext:Store ID="cmbTypeEdStore" runat="server" OnLoad="cmbTypeEdStore_Load">
                                                        <Model>
                                                            <ext:Model runat="server">
                                                                <Fields>
                                                                    <ext:ModelField Name="type" />
                                                                </Fields>
                                                            </ext:Model>
                                                        </Model>
                                                    </ext:Store>
                                                </Store>
                                            </ext:ComboBox>                                            
                                        </Editor>
                                    </ext:Column>
                                    <ext:Column
                                        runat="server"
                                        Text="Title"
                                        DataIndex="title"
                                        Flex="1">
                                        <Filter>
                                            <ext:StringFilter />
                                        </Filter>
                                        <Editor>
                                            <Ext:TextField runat="server" AllowBlank="False" />
                                        </Editor>
                                    </ext:Column>                                    
                                </Columns>
                            </ColumnModel>
                            <SelectionModel>
                                <ext:CellSelectionModel ID="CellSelectionModel1" runat="server" />
                            </SelectionModel>
                            <Plugins>
                                <ext:GridFilters ID="GridFilters1" runat="server" />
                                <ext:CellEditing ID="CellEditing1" runat="server">
                                    <Listeners>
                                        <Edit Fn="edit" />
                                    </Listeners>
                                </ext:CellEditing>
                            </Plugins>
                        </ext:GridPanel>
Edit function:
var edit = function (editor, e) {    
                // Call DirectMethod
                if (!(e.value === e.originalValue || (Ext.isDate(e.value) && Ext.Date.isEqual(e.value, e.originalValue)))) {
                    Fields.Edit(e.record.data.ID, e.field, e.originalValue, e.value, e.record.data);
                }
            };
Direct Method:
[DirectMethod(Namespace = "Fields")]
        public void Edit(int id, string field, string oldValue, string newValue, object customer) ///////NOT USED
        {
            string message = "<b>Property:</b> {0}<br /><b>Field:</b> {1}<br /><b>Old Value:</b> {2}<br /><b>New Value:</b> {3}";

            // Send Message...
            X.Msg.Notify(new NotificationConfig()
            {
                Title = "Edit Record #" + id.ToString(),
                Html = string.Format(message, id, field, oldValue, newValue),
                Width = 250,
                Height = 150
            }).Show();


            DAL.DataContext dc = new DAL.DataContext();

            var result =
                (from i in dc.TMFFiles
                 where i.id == id
                 select i).First();

            switch (field){
                case "type": 
                    result.Type = newValue;
                    dc.SubmitChanges();
                    break;
                case "title":
                    result.Title = newValue;
                    dc.SubmitChanges();
                    break;
                case "status":
                    result.Status = newValue;
                    dc.SubmitChanges();
                    CartesianStore_ReadData(null, null);
                    break;
            }


        }