We just upgraded to .Net Framework 4.5. We are using UI for ASP.NET AJAX Q3 2012 SP2. I have a GridAttachmentColumn that works fine in our development environment. When deployed to QA we get the below error when clicking on the + sign to add a new record to the grid and the Grid Attachment control does not appear.
Error: Object doesn't support property or method 'registerControlProperties'
Anonymous function [Line: 395, Col: 1], Telerik.Web.UI.WebResource.axd
Global code [Line: 5, Col: 2], Telerik.Web.UI.WebResource.axd
Thanks in advance for any help on this issues.