поэтому исправление будет
-(void)goTo2{
//calling the .xib file and the SettingsViewController
SettingsViewController *aSettingsView = [[SettingsViewController alloc] initWithNibName:@"Settings" bundle:nil];
[self setSettingsViewController:aSettingsView];
[aSettingsView release];
[self.window addSubview:[settingsViewController view]];
//moving the view 30px down
[[settingsViewController view] setFrame:CGRectMake(0, 20, 320, 460)];
[UIView beginAnimations:nil context:NULL];
[UIView setAnimationDuration:1.0];
//setting the animation
[UIView setAnimationTransition:UIViewAnimationTransitionFlipFromRight forView:window cache:YES];
[UIView commitAnimations];
[settingsViewController release];
settingsViewController = nil;
}