Telerik Test Studio Not finding Element : End of Stream encountered before parsing was completed

Overall Result: Fail
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'12/26/2016 11:42:28 PM' - Executing test: 'WPFTest', path: 'WPFTest.tstest.'
'12/26/2016 11:42:28 PM' - Using .Net Runtime version: '4.0.30319.42000' for test execution. Build version is '2016.3.928.0'.
'12/26/2016 11:42:28 PM' - Starting execution....
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'12/26/2016 11:42:36 PM' - Using 'C:\Users\sujanah\SBCNE_1.2\SBCNE_PATH\bin\Debug\SBCNE.PATH.exe' application.
'12/26/2016 11:42:37 PM' - 'Pass' : 1. LeftClick on Item0Textboxview
'12/26/2016 11:42:39 PM' - 'Pass' : 2. Type 'Admin' into TextBoxUserNameTextbox
'12/26/2016 11:42:41 PM' - 'Pass' : 3. LeftClick on Item1Textboxview
'12/26/2016 11:42:43 PM' - 'Pass' : 4. Type 'Admin1' into PasswordBoxPasswordPasswordbox
'12/26/2016 11:42:44 PM' - 'Pass' : 5. LeftClick on LoginTextblock
'12/26/2016 11:45:03 PM' - 'Fail' : 6. LeftClick on DashboardTextblock
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Failure Information: 
~~~~~~~~~~~~~~~
End of Stream encountered before parsing was completed.
InnerException:
System.Runtime.Serialization.SerializationException: End of Stream encountered before parsing was completed.
   at System.Runtime.Serialization.Formatters.Binary.__BinaryParser.Run()
   at System.Runtime.Serialization.Formatters.Binary.ObjectReader.Deserialize(HeaderHandler handler, __BinaryParser serParser, Boolean fCheck, Boolean isCrossAppDomain, IMethodCallMessage methodCallMessage)
   at System.Runtime.Serialization.Formatters.Binary.BinaryFormatter.Deserialize(Stream serializationStream, HeaderHandler handler, Boolean fCheck, Boolean isCrossAppDomain, IMethodCallMessage methodCallMessage)
   at ArtOfTest.WebAii.Messaging.Process.PipeCommand.FromBinary[T](Byte[] bytes)
   at ArtOfTest.WebAii.Messaging.Process.PipeCommunication.ReadCommandFromPipe[T](PipeStream pipe)
   at ArtOfTest.WebAii.Messaging.Process.BrowserRemoted.ProcessBrowserRequest(BrowserCommand command, String requestId)
   at ArtOfTest.WebAii.Wpf.WpfProxy.ExecuteSLCommand(SilverlightCommand cmd)
   at ArtOfTest.WebAii.Wpf.WpfProxy.GetAllVisualTrees()
   at ArtOfTest.WebAii.Wpf.WpfWindow.RefreshVisualTrees()
   at ArtOfTest.WebAii.Wpf.WpfWindow.EnsureStateIsCurrent()
   at ArtOfTest.WebAii.Design.Execution.ExecutionUtils.WaitForAllElements(IAutomationHost host, AutomationDescriptor descriptor, Int32 timeout)
   at ArtOfTest.WebAii.Design.Execution.ExecutionEngine.ExecuteStep(Int32 order)
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'12/26/2016 11:45:03 PM' - Detected a failure. Step is marked 'ContinueOnFailure=False' aborting test execution.
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'12/26/2016 11:45:03 PM' - Overall Result: Fail
'12/26/2016 11:45:03 PM' - Duration: [2 min: 27 sec: 67 msec]
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'12/26/2016 11:45:03 PM' - Test completed!