Unable to determine the type of 'maskedinputtextbox' element

When I try to set text to field, Test Studio returns error: Unable to determine the type of 'maskedinputtextbox' element.
I'm using Infragistic XamDateTimeInput control on my silverlight app. This control contains masked input textbox and toogle button to expand calendar.
How can I resolve this problem?

'Fail' : 23. Set text contents of PARTInputTextBoxMaskedinputtextbox to '2013-12-03'
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Failure Information: 
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Unable to determine the type of 'maskedinputtextbox' element. Check the log for details.
InnerException:
System.ArgumentException: Unable to determine the type of 'maskedinputtextbox' element. Check the log for details.
   w ArtOfTest.WebAii.Silverlight.FrameworkElement.CastAs[T]()
   w ArtOfTest.WebAii.Design.IntrinsicTranslators.Silverlight.Descriptors.TextBoxSetTextActionDescriptor.Execute(IApplication hostApp)
   w ArtOfTest.WebAii.Design.Extensibility.XamlActionDescriptor.Execute(IAutomationHost autoHost)
   w ArtOfTest.WebAii.Design.Execution.ExecutionEngine.ExecuteStep(Int32 order)
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the log file in attachements