I'm having a little problem with an iPhone app I'm currently developing. When the user touch a button, it calls an IBAction named refreshQuestion, which is supposed to show an image hover the screen to ask the user to wait a moment, then it has to call another function, and finally it has to hide the image.

The problem is that the image won't appear. As well as the network activity indicator.

Any help?

Here is the code :

- (IBAction)refreshQuestion:(id)sender{
pleaseWait.hidden = NO;
[UIApplication sharedApplication].networkActivityIndicatorVisible = YES;    
[self loadData];
pleaseWait.hidden = YES;
[UIApplication sharedApplication].networkActivityIndicatorVisible = NO; 

}