ArtOfTest.Common.Design.Exceptions.ElementFindException: Unable to locate element. Details: Attempting to find [Silverlight] element using 
Find logic 
 (Html): [id 'Exact' silverlightControlHost][tagIndex 'Exact' object:0]
 (Silverlight): [XamlPath 'Exact' /canvas[0]/browserwindowpresenter[0]/radwindow[0]] AND [XamlTag 'Exact' radwindow]

Unable to locate element. Search failed!

Learn more about finding elements here:
http://www.telerik.com/automated-testing-tools/support/documentation/user-guide/troubleshooting_guide/test-execution-problems/unable-to-locate-element.aspx
   at ArtOfTest.WebAii.Design.Execution.ExecutionUtils.WaitForAllElements(IAutomationHost host, AutomationDescriptor descriptor, Int32 timeout)
   at ArtOfTest.WebAii.Design.Execution.ExecutionEngine.ExecuteStep(Int32 order)