there should be a Log button visible in the Test Studio GUI (screenshot 1). Click on it for details on the compilation problem. If its not immediately visible you might need to expand the Steps view. You can do that by dragging the expand control on the left (screenshot 2).
Let me know if you require any additional assistance with this.
the Telerik team
Do you think you know all the new features coming out in Test Studio R1 2011?
Think again - we have some surprises and will share them with you in the What's New in Test Studio R1 2011 Webinar on May 12th.