Rad Controls In AJAX In Designer View / Getting An Error PostError Creating Control?

Mar 2, 2011

getting an error like this:

PostError Creating Control
RadTabStrip1Failed to create designer 'Telerik.Web.UI.RadTabStrip, Telerik.Web.UI, Version=2010.1.415.35, Culture=neutral, PublicKeyToken=121fae78165ba3d4'**

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