Become UIScrollViewDelegate delegate for UITableView

I have a UITableView instance variable. I want to be able to register my view controller to be the UIScrollViewDelegate for my UITableViewController. I have already tried

tableView.delegate = self;

But when scrolling, my methods

- (void)scrollViewDidEndDecelerating:(UIScrollView *)scrollView
- (void)scrollViewDidEndDragging:(UIScrollView *)scrollView            
                  willDecelerate:(BOOL)decelerate

don't get called. Any suggestions?