Unfortunately, the GIF image does not contain enough information for us to determine what is wrong in your project.
By looking at the picture you have provided we could not locate RadDataPager for Silverlight. Are you using RadDataPager for Silverlight?
We might be able to help if you share more information regarding your project.
the Telerik team
Registration for Q1 2011 What’s New Webinar Week is now open. Mark your calendar for the week starting March 21st and book your seat
for a walk through all the exciting stuff we ship with the new release!