After further investigation, the update panel is unrelated to the issue. I have removed the update panel, the postback is happening, but the associated event never fires. The docks and the children controls are added dynamically on MasterPage Page_Init event.
The child controls of the RadDock will not perform postbacks, because the UpdatePanel for which the dock is an ajax trigger, will catch the request to the server, and instead of a full postback a partial one will occur.
Thank you for the sample source code. I tried to run it, but I got many errors that could not resolve. That's why I created a sample project based on the MyPortal demo. Instead of adding predefined UserControls I am adding a Button controls, and handling their Click events. The associated events are fired. Please find the project attached to the thread.
In case you still cannot resolve the issue, please open a new support ticket and send a fully working sample that demonstrates the issue and we will do our best to help you resolve the problem.
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