release mpmoviecontroller from another view

Question

I have the mpmoviemovie controller over which I have 2 more views. One of the view has a button over it. On the action of those buttons i want to stop and release the player. hwen I try to release the subviews

NSArray* SubViews=   [[self.view superview] subviews];
for (int i=0 ;i<[SubViews count]; i++){  
 [[SubViews objectAtIndex:i] removeFromSuperview];
}
[[self navigationController] popToRootViewControllerAnimated:YES];

I release all the subviews but it doenot go back to the view that had these views generated and also the audio keeps on playing.