Hi,
I have a PopulateGrid loaded as PartialView
Upon Load i have set the Store to AutoLoad

i am using JsonReader and i see on code-behind that the call arrives,
problem is that the grid is not populated
what am i missing here

here is my grid ascx:

<%@ Control Language="C#" Inherits="System.Web.Mvc.ViewUserControl"%>

<%@ Register Assembly="Ext.Net" Namespace="Ext.Net" TagPrefix="ext" %>


<script runat="server">
    protected void Page_Load(object sender, EventArgs e)
    {
        if (ViewData["nodeid"] != null)
        {
         //   dsProperties.DataBind();
            //this.nodePropertiesProxy.ResourceManager.regis(string.Format("nodePropertiesFN({0},{1},{2});", ViewData["nodeid"], ViewData["accessid"], ViewData["winmethodid"]));
        }
    }

    void dsProperties_Load(object sender, EventArgs e)
    {
        
    }
    
    
</script>
<script type="text/javascript">
    //alert('js');
    //nodeProperties(1, 22, 24);

    var nodePropertiesFN = function (nodeDetails, access, winmethod) {
        debugger;
        //alert("inside nodeProperties");
        if (Ext.isEmpty(nodeDetails, false)) {
            return;
        }
        dsProperties.load({ params: { nodeId: nodeDetails, accessid: access, winmethodid: winmethod} });
    };
</script>


<ext:ResourceManagerProxy ID="nodePropertiesProxy" runat="server" >

</ext:ResourceManagerProxy>

<ext:Hidden ID="hiddennodeid" runat="server" Text='<%# ViewData["nodeid"] %>' AutoDataBind="true" />
<ext:Hidden ID="hiddenaccessid" runat="server" Text='<%# ViewData["accessid"] %>' AutoDataBind="true" />
<ext:Hidden ID="hiddenwinmethodid" runat="server" Text='<%# ViewData["winmethodid"] %>' AutoDataBind="true" />
<ext:FitLayout runat="server"> 
    <Items>         
        <ext:Panel runat="server" Title="Example">             
            <Content>                 
               <ext:PropertyGrid 
                    ID="grpNodeDetails" 
                    runat="server" 
                    Width="300" 
                    AutoHeight="true">
                    <Store>
                         <ext:Store ID="dsProperties" runat="server" AutoLoad="true">
                                <Proxy>
                                    <ext:HttpProxy Url="/Data/GetNodeProperties/" />
                                </Proxy>
                                <UpdateProxy>
                                    <ext:HttpWriteProxy Url="/Data/SaveTreeDetails/" />
                                </UpdateProxy>
                                <Reader>
                                     <ext:JsonReader>
                                        <Fields>
                                            <ext:RecordField Name="fieldName" />
                                            <ext:RecordField Name="fieldValue"/>
                                        </Fields>
                                    </ext:JsonReader>
                                </Reader>
                                <BaseParams>
                                    <ext:Parameter Name="nodeId" Mode="Raw" Value="#{hiddennodeid}.getValue()"></ext:Parameter>
                                    <ext:Parameter Name="accessid" Mode="Raw" Value="#{hiddenaccessid}.getValue()"></ext:Parameter>
                                    <ext:Parameter Name="winmethodid" Mode="Raw" Value="#{hiddenwinmethodid}.getValue()"></ext:Parameter>
                                </BaseParams>
                            </ext:Store>
                    </Store>
                    <ColumnModel>
                        <Columns>
                            <ext:Column ColumnID="fieldName" DataIndex="fieldName"></ext:Column>
                            <ext:Column ColumnID="fieldValue" DataIndex="fieldValue"></ext:Column>
                        </Columns>
                    </ColumnModel>
                    <View>
                        <ext:GridView ID="GridView1" ForceFit="true" ScrollOffset="2" runat="server" />
                    </View>
                    <Buttons>
                       <%-- <ext:Button ID="Button1" runat="server" Text="Add property">
                            <DirectEvents>
                                <Click OnEvent="AddPropertyClick" />
                            </DirectEvents>
                        </ext:Button>
                        <ext:Button ID="Button2" runat="server" Text="Remove property">
                            <DirectEvents>
                                <Click OnEvent="RemovePropertyClick" />
                            </DirectEvents>
                        </ext:Button>
                        <ext:Button runat="server" ID="Button3" Text="Save" Icon="Disk">
                            <DirectEvents>
                                <Click OnEvent="Button1_Click" />
                            </DirectEvents>
                        </ext:Button>  --%>              
                    </Buttons>        
                     <Listeners>
                        <Render Handler="this.getStore()" />
                     </Listeners>
                </ext:PropertyGrid>
           
            </Content>         
        </ext:Panel>     
    </Items> 
</ext:FitLayout>
on Server side i am building the response like this:

  object[] _objectList = new object[_node.Attributes.Count];
            int _counter = 0;

            foreach (XmlAttribute _att in _node.Attributes)
            {
                _objectList[_counter] = new object[] { new GridProperties() { fieldName = _att.Name,fieldValue = _att.Value }};
                _counter++;
            }
            ajaxStoreResult.Data = _objectList;
            return ajaxStoreResult;
any help would be gr8,
i tried working with a simple grid, but i am getting an error .

oh, one more thing:
the grid is loaded as part of an AsyncTreeNode Selection.