I am not sure about the reason you experience such difficulties especially when using the latest control version and have merely copy-pasted our example. I think it would be best if you could just send us your project as it is - with the bin folder, etc so we can run it here and see what causes these problems. I am attaching instructions how you can open a support ticket where you can attach files. Looking forward to your code.
All the best,
the Telerik team