The difference between trial and dev version is that into the trial version randomly a trial message is appeared. However there are not any other differences, so I assume that the dev dll does not cause the problem. Can you please confirm that you use the right version of our dll? We distributed dlls for .net 3.5, .net 4.0 and .net 4.5. – Please confirm that the version of the dll is the same as the version of your application.
Additionally please note that without having a runnable example and reproducing the problem we cannot provide you guidelines for how the problem can be solved. As I said in my previous post it will be helpful if you could send us a small runnable example where the problem can be reproduced.
Looking forward for your reply.
Check out the Telerik Platform - the only platform that combines a rich set of UI tools with powerful cloud services to develop web, hybrid and native mobile apps.