There used to be an issue with the RadButton when it is used as an image button and the website that contains it, is configured to use a cookieless sessionState. This issue has already been fixed and you can check its status here
I have tried to reproduce the issue with the latest official version (2013.1.220) of RadControls but to no avail. You can watch a short video with the test here
, and then notify me if I am missing something.
Could you confirm that you are using the latest version of RadControls, and if not, does upgrading to the latest one resolves your issue? This blog
will guide you on how to do the upgrade.
If the above step, however, does not help, could you please try to reproduce the issue with the VS sample I have attached and then tell us what changes you have made, so that we can make an investigation locally? Note that I have used a standard ASP.NET Web Application for the test and the database files have been removed, in order to decrease the size of the attachment.
All the best,
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