Telerik Trial Modules and DotNetNuke 5.2.1

If you are trying to install Telerik DNN Modules 2009 3 1208 trial package over a new DotNetNuke 5.2.1 instance, i strongly recommend to wait a few days since i couldn't do it altough i tried it several times.

To investigate the ASP.NET error, i had to set Custom Errors Mode to Off (default is RemoteOnly). Even this wouldn't help about the problem. Then i decided to open a discussion at Telerik Forums. Now waiting for the answer. Will update here, after receiving response from Telerik collegues.