The issue is reproducible only in Internet Explorer 10. Steps to reproduce: 1. Navigate to http://www.asp.net/ajaxlibrary/AjaxControlToolkitSampleSite/CascadingDropDown/CascadingDropDown.aspx 2. Record a test in which you are selecting values in all 3 CascadingDropDowns. 3. Execute the test. Expected: Test Studio is selecting values in all CascadingDropDowns. Actual: After selecting a value in the first Ajax CascadingDropDown the second one is not enabled and Test Studio is unable to select a value. Test project and video are available in the internal description.