RadComboBox with Ajax

[Viswanathan]

Hi,

I have 2 related comboboxes which works perfectly without AJAXManager; but when you turn on the AJAXManager, it fires the event but the second combobox is not clickable or nothing happens (no dropdown) when clicking the dropdown button. The controls are within a ASCX page that is loaded dynamically into a RADMultipage PageView during runtime.

<div>
      <telerik:RadAjaxManager ID="RadAjaxManager1" runat="server"
          EnablePageHeadUpdate="False">
          <AjaxSettings >
              <telerik:AjaxSetting AjaxControlID="cboApplication" EventName="SelectedIndexChanged">
                  <UpdatedControls>
                      <telerik:AjaxUpdatedControl ControlID="cboComponents" />
                  </UpdatedControls>
              </telerik:AjaxSetting>
          </AjaxSettings>
      </telerik:RadAjaxManager>

  </div>
      <div class="contents">
          <table>
              <tr> <td class="LabelColumn"><asp:Label ID="lblApplication" CssClass="Labels" Text="Application: " runat="server"></asp:Label></td> <td colspan="3">
                  <telerik:RadComboBox ID="cboApplication" runat="server" AutoPostBack="True"  OnSelectedIndexChanged="cboApplication_SelectedIndexChanged"
                      Width="320px" />
                  </td> </tr>
              <tr><td class="LabelColumn"><asp:Label ID="lblComponent" Text="Component: " CssClass="Labels" runat="server"></asp:Label></td> <td colspan="3"><telerik:RadComboBox ID="cboComponents" runat="server" Width="320px" /></td></tr>
              <tr><td class="LabelColumn"><asp:Label ID="lblRType" runat="server" Text="Type: " /></td><td colspan="3"><telerik:RADComboBox ID="cboReleaseType" Width="320px" runat="server" /></td></tr>
              <tr><td class="LabelColumn"><asp:Label ID="lblVersion" Text="Version: " CssClass="Labels" runat="server"></asp:Label></td> <td colspan="3"><telerik:RadTextBox ID="txtVersion" runat="server" Width="320px" /></td></tr>
              <tr><td class="LabelColumn"><asp:Label ID="lblArea" runat="server" Text="Area: " /></td><td colspan="3"><telerik:RadComboBox ID="cboArea" runat="server" Width="316px" /></td></tr>
              <tr><td class="LabelColumn"><asp:Label ID="lblDeployTime" Text="Deploy Time: " runat="server" /></td>
                  <td><telerik:RadNumericTextBox ID="txtDeployTime" runat="server" Width="110px" /></td>
                  <td class="LabelColumn"><asp:Label runat="server" ID="lblRevertTime" Text="Revert Time: " /> </td>
                  <td><telerik:RadNumericTextBox ID="txtRevertTime" runat="server" Width="110px" /></td>
              </tr>
           </table>
      </div>

Protected Sub cboApplication_SelectedIndexChanged(sender As Object, e As Telerik.Web.UI.RadComboBoxSelectedIndexChangedEventArgs) Handles cboApplication.SelectedIndexChanged
    Dim connection As New SqlConnection(ConfigurationManager.ConnectionStrings("mConnectionString").ConnectionString)

    Dim adapter As New SqlDataAdapter("SELECT * FROM tblComponents WHERE AppID = " & e.Value & " order by ComponentName", connection)
    Dim dt As New DataTable()
    adapter.Fill(dt)

    cboComponents.DataTextField = "ComponentName"
    cboComponents.DataValueField = "ComponentID"
    cboComponents.DataSource = dt
    cboComponents.DataBind()
    'insert the first item
    cboComponents.Items.Insert(0, New RadComboBoxItem(""))
End Sub

Any help would be appreciated