According to your description, the RadButton control appears to be missing from your installation of RadControls for ASP.NET AJAX. This is quite strange, as such behavior is examined only in releases before Q3 2010 Beta
, in which the control was introduced. Please check the version that is referenced in your project after the upgrade and ensure that it is the desired one. You can use the approaches suggested in this blog post
in order to detect the currently used version.
Also, you can try the suggestions in the help article Upgrading RadControls Trial to RadControls Developer license or newer version
. The listed steps are valid for upgrading from a developer version of RadControl as well, so it could be useful in resolving the encountered issue.
I hope this helps. Don't hesitate to contact us again if you are still having difficulties.
the Telerik team
If you want to get updates on new releases, tips and tricks and sneak peeks at our product labs directly from the developers working on the RadControls for ASP.NET AJAX, subscribe to their blog feed