<telerik:RadComboBox ID="RadComboBox1" runat="server" Width="250px" Height="150px"

EmptyMessage="Select a Company" EnableLoadOnDemand="True" ShowMoreResultsBox="true"

EnableVirtualScrolling="true" OnItemsRequested="RadComboBox1_ItemsRequested">

</telerik:RadComboBox>

protected void RadComboBox1_ItemsRequested(object sender, RadComboBoxItemsRequestedEventArgs e)

{

DataTable data = GetData(e.Text);

int itemOffset = e.NumberOfItems;

int endOffset = Math.Min(itemOffset + ItemsPerRequest, data.Rows.Count);

e.EndOfItems = endOffset == data.Rows.Count;

for (int i = itemOffset; i < endOffset; i++)

{

RadComboBox1.Items.Add(

new RadComboBoxItem(data.Rows[i]["CompanyName"].ToString(), data.Rows[i]["CompanyName"].ToString()));

}

e.Message = GetStatusMessage(endOffset, data.Rows.Count);

}

I have a strange situation. I run 2009 Q1, on XP-pro dev box with VS2008. I tried to run designer DLL from bin and from GAC and have the same result. The runtime is perfect but the designers crashed if I use not auto-generated columns. If I have my custom columns then change of any grid property via designer replaces the tag:     

<telerik:GridBoundColumn>    ( works fine)

With tag:

<Telerik.Web.UI.GridBoundColumn>  ( dose not work)

With designer error message that the GridColumnsCollection can't find the items of type Telerik.Web.UI.GridBoundColumn.

Would you please advise where this comes from?

The problem began when I converted my trail version into the fully licensed version.  I did follow all instruction how to do it, in fact I did it multiple times, including a complete uninstall all Telerik components and install the new licensed package.

Thank you.