When using DragToTick method for RadSlider the following exception is thrown:

InnerException:
ArtOfTest.Common.Exceptions.FindElementException: Element Not found!
FindExpression used: 
[name 'Exact' HorizontalRangeEndThumb]

   at ArtOfTest.Common.WaitSync.CheckResult(WaitSync wait, String extraExceptionInfo, Object target)
   at ArtOfTest.Common.WaitSync.For[T](Predicate`1 predicate, T target, Boolean invertCondition, Int32 timeout, WaitResultType errorResultType)
   at ArtOfTest.WebAii.Silverlight.VisualWait.ForExistsInternal(Int32 timeout, Boolean invertCondition)
   at ArtOfTest.WebAii.Silverlight.VisualWait.ForVisible(Int32 timeout)
   at ArtOfTest.WebAii.Silverlight.VisualFind.ReturnOrThrow(FrameworkElement e, String throwMessage)
   at ArtOfTest.WebAii.Silverlight.VisualFind.ByName(String name)
   at Telerik.WebAii.Controls.Xaml.RadSlider.get_HorizontalRangeEndThumb()
   at Telerik.WebAii.Controls.Xaml.RadSlider.DragToTick(ThumbName thumbName, Int32 tickIndex)