Highlight the step that makes the selection and go to the Properties pane. Under the Behavior heading you'll see the SelectDropDownType property (see screen shot). Change it to ByText and ensure the SelectionText property is correct.
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?