Thank you for your interest in Telerik Test Studio.
You say you click a browse button which leads me to the conclusion the window that appears is a file upload dialog window. You could find attached a test recorded against a sample web application to check the upload functionality. Please try to run it and check if it works for you. Please note that you must change the exact path in step number 3. to a file locally stored you want to upload. You could use it as a sample to design your own test.
Please let me know if this helped you figure out your query.
Hope to hear from you soon.