Could you please examine the attached project which demonstrates a possible approach of navigating to different SilverLight pages with RadTabControl. You can also modify it and send it back so that it shows the issue you have come up with. This way we could advice you better and provide you with a better suited solution.
the Telerik team
Registration for Q1 2011 What’s New Webinar Week is now open. Mark your calendar for the week starting March 21st and book your seat
for a walk through all the exciting stuff we ship with the new release!