Hi,
I have a problem to reload a combobox in a gridpanel dynamically; I have two gridPanel (north and sud) a I want that when i select a row in a grindpanel north, a combobox in a gridpanel south reloads its values dynamically. Instead I get an error JS.
Here my code:

In the gridpanel north I have a Direct event when I change the row:

<SelectionModel>
                            <ext:RowSelectionModel ID="RowSelectionModel1" runat="server" Mode="Single">
                                <DirectEvents>
                                    <Select OnEvent="RowSelect" Buffer="250">
                                        <EventMask ShowMask="true" Msg="Loading..." MinDelay="500" />
                                        <ExtraParams>
                                            <ext:Parameter Name="ID" Value="record.data.ID" Mode="Raw" />
                                        </ExtraParams>
                                    </Select>
                                </DirectEvents>
                            </ext:RowSelectionModel>
                        </SelectionModel>

In the code behind:

protected void RowSelect(object sender, DirectEventArgs e)
        {
            string ID = e.ExtraParams["ID"];

            oDB.OpenConnection();
            oDB.populateComboBox(cmbFinalSteps, "SELECT ID, DESCRIPTION FROM TB_PROJECTTYPESTEPS WHERE ID_PROJECTTYPE = " + ID + " ORDER BY STEPORDER", "ID", "DESCRIPTION", "", "", CommandType.Text);
            cmbFinalSteps.GetStore().DataBind();
            cmbFinalSteps.Render();

            oDB.CloseConnection();

            this.BindDataSteps(ID);
            this.BindDataConditions(ID);
        }

The error show when execute:

cmbFinalSteps.Render();
Can someone help me please?
Thank you!

Stefano Lonati