I am glad we were able to resolve your problem quickly. Just to document what we did... I deleted the trial license files that were on your computer. This allowed the Manual activation to work as expected. Automatic activation did not work as it would report "invalid credentials" when you tried to enter valid credentials. I have alerted my QA people to re-test this on Spanish Windows 7 to try and isolate what is causing this problem.
You can reach us here if you have any further problems. You may also submit priority support tickets now as well since you are a paid customer.
the Telerik team
Check out the Test Studio roadmap
to find out more about the new performance testing functionality coming in our R2 2011 release this September!
Have you looked at the new Online User Guide
for Telerik Test Studio?