UIPickerView in UITableViewController view - scrolling problem

I have a pickerView in the UITableviewcontroller. When the user clicks on theUITextfield the pickerview pops up and works fine. But after the done action is performed the UITablevie开发者_Go百科w wont scroll till the botteom. What problem it could be. I used Apple's UIPicker sample code. Any help is appreciated.

Thanks