I'm using the AJAX Control Toolkit for .NET Framework 3.5 with VS2008, and I have a ReorderList with a LinkButton inside the ItemTemplate like so:

<ajaxToolkit:ReorderList ID="SelectedTextItems" runat="server" DataKeyField="Identity" SortOrderField="Order" EnableViewState="true" PostBackOnReorder="true">
  <ItemTemplate> 

     <asp:LinkButton ID="Remove" runat="server" CommandName="Remove" Text="Remove" CssClass="GeneralText" />

  </ItemTemplate>
</ajaxToolkit:ReorderList>

In my CodeBehind file is the following:

Private Sub SelectedTextItems_ItemCommand(ByVal sender As Object, ByVal e As AjaxControlToolkit.ReorderListCommandEventArgs) Handles SelectedTextItems.ItemCommand
      ....
End Sub

But when I set the Debugger to break on the first line of this handler, I see that it is never entered. Other handlers for the ItemCreated and ItemReorder events work as expected. What is the problem with the ItemCommand event? Is this an issue with the .NET Framework 3.5 version?

I think you need to set its OnItemCommand Property  to the handler Function name  ,

<ajaxToolkit:ReorderList ID="SelectedTextItems" OnItemCommand="SelectedTextItems_ItemCommand" 

That's not normally necessary in VB.NET if you use the "Handles .." syntax, and hasn't been necessary for my other ReorderList handlers, though in desperation I did try that (making the method Public and removing the "Handles .." clause) but without success. 

I have discovered at least a workaround. I was using the ReorderList without a DragHandleTemplate. When I add a DragHandleTemplate the ItemCommand event is handled as expected.

your solution could be here,

Visit  http://prasadmaduranga.blogspot.com/2009/08/ajax-reorder-list-issues-and-solutions.html

Post your feedback in the blog as a comment.

Thanks.