iPad – arrive when Popover is still visible

-(void)showsearch:(id)sender
{
 SearchViewController *searchview =[[SearchViewController alloc] initWithNibName:@"SearchViewController" bundle: nil];

 settingpopoverController = [[[UIPopoverController alloc] 
 initWithContentViewController:searchview] autorelease]; 
 [searchview release];
 [settingpopoverController presentPopoverFromBarButtonItem:sender 
 permittedArrowDirections:UIPopoverArrowDirectionAny animated:YES];


}

- (void)showsearch:(id)sender
{
 SearchViewController *searchview =[[SearchViewCont roller alloc] initWithNibName:@"SearchViewController" bundle:nil];

 settingpopoverController = [[[UIPopoverController alloc] 
 initWithContentViewController:searchview] autorelease]; 
 [searchview release]; 
 [settingpopoverController presentPopoverFromBarButtonItem:sender 
 permittedArrowDirections:UIPopoverArrowDirectionAny animated:YES];


}

When I click the button, the app crashes , I got [UIPopoverController dealloc], and the popover is still visible. Information.

I think the autorelease is incorrect, this is a tutorial

http://www.jannisnikoy.nl/index.php/2010/04/ipad-tutorial-creating-a-popoverviewcontroller