Test Studio automated against much more than just WPF applications. We can automate against any web application that generates HTML to the browser. Additionally, we work great with Silverlight (both in browser and out-of-browser).
If you are open to continuing to work with us, we may have a solution - try right-clicking your VS icon and selecting the ‘Run as Administrator’ option. After doing so, you should be prompted by our licensing wizard to activate your trial of Test Studio.
If you continue to have trouble, please let us know and we would be happy to assist.
the Telerik team
for a live 'What's New in Test Studio R1 2011 SP2' event on Tuesday, July 19 at 2pm EST!
Have you looked at the new Online User Guide
for Telerik Test Studio?