I have a tabcontainer on my page, to which I dynamically add tabpanels. Each tabpanel is then filled with a usercontrol containing a gridview. This works fine (also thanks to the help of experts here in EE). My problem now is that I have a button in the gridview which does not fire. It is wired to a OnRowCommand but when clicked nothing happens. My idea was to raise an event in the OnRowCommand and then handle it in my page. I have also tried this with adding a button to the usercontrol, but its buttonclick even does not fire either (I have put a breakpoint and it just never reaches it). The page does a postback, the tabcontainer_Init loads the usercontrol and the usercontrols page_load event fires, but nothing else is done. Any help will be greatly appreciated.