Ajaxified RadTreeList with user control CRUD combobox not dropping down

[Kevin]

So I have a rad tree list.  In there I am using a user control  that is getting it's data source from code behind.

protected override void OnInit(EventArgs e)
{
    //
    // CODEGEN: This call is required by the ASP.NET Web Form Designer.
    //
    InitializeComponent();
    base.OnInit(e);
    listOfMenuTypes = new SubCategory().SelectAllSubCategoriesBySiteNotDeleted(ThisSiteID).Where(i => i.CategoryID == new Category().SelectCategoryByDescriptionAndSiteIDNotDeleted("Menu Types", ThisSiteID).LookupCategoryID).ToList();
}

and then I set the combobox data source like this

protected void HomeDocumentForm_DataBound(object sender, EventArgs e)
{
    MenuSelectList.DataSource = listOfMenuTypes;
    MenuSelectList.DataTextField = "TypeDescription";
    MenuSelectList.DataValueField = "LookupTypeID";
    MenuSelectList.DataBind();
}

If I remove the ajaxification it works perfectly.  If I leave it the combo box won't drop down.

I could use some help on this.

[Kevin]

bump.  Anyone?

[Andrey]

Hi,

Most probably the problem comes from a JavaScript error. Please check for JavaScript errors using some JS debugger like FireBug of F12 in IE. Additionally, you could check how to enable the Script debugging in IE in this MSDN thread.

If this does not helps please provide your full page source code along with the code-behind file content. Thus all the people who want to help you will have better understanding of your case.

Greetings,
Andrey
the Telerik team

[Kevin]

There was an error.  It was that my function was undefined.  The problem was that I didn't wrap the <script> inside of a RadScriptBlock.  So it was showing as undefined when it was ajaxified.