Thank you for writing.
The provided information is not enough for me to determine what causes this behavior. What I will suggest is to take a look at this article
which explains the permitted ways of distribution of products created with RadControls for WinForms and also how to do it.
If you continue experiencing issues, please get back to me with the problematic project and description how to reproduce the issue, so I can investigate it and help you with it.
the Telerik team