I am glad to hear that you have resolved the issue. However, the RadChart control has many known limitations and issues and one of those is the described issue. Therefore, we decided to create new charting components
with better implementation and enhanced performance. You could read about the differences between the components in this article.
Check out the new Telerik Platform - the only modular platform that combines a rich set of UI tools with powerful cloud services to develop web, hybrid and native apps. Register for the free online keynote and webinar to learn more about the Platform on Wednesday, February 12, 2014 at 11:00 a.m. ET (8:00 a.m. PT).