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UIAlertView delegate methods don't response on iOS 5.1
//myClass.h
    @interface MainMenu : UIViewController<UIAlertViewDelegate>
-(IBAction)secondAct:(id)sender;

-(IBAction)secondAct:(id)sender
      alert = [[UIAlertView alloc] initWithTitle:@"Dear User"
                                                        message:@"Your Request Will be Sent To Security"
                                                       delegate:nil
                                              cancelButtonTitle:@"Cancel"
                                              otherButtonTitles:@"OK", nil];
  [alert show];
  [alert autorelease];
}

-(void)alertView:(UIAlertView *)alertView clickedButtonAtIndex:(NSInteger)buttonIndex{
 NSLog(@"UIAlertView delegate works");//this line too isnt displayed
 NSString *title=[ alertView buttonTitleAtIndex:buttonIndex ];
 if ([title isEqualToString:@"OK"]) {
NSLog(@"OK Pressed");
}//i want to create something like this