dismissViewControllerAnimated not working

I am using Storyboard with IOS6. I am trying to go back to the previous viewcontroller but it is not working. I customized my backbutton here. ``` UIButton *btnBack = [UIButton buttonWithType:UIButtonTypeCustom]; btnBack.frame = CGRectMake(0, 0, 45,35); [btnBack setTitle:@"Back" forState:UIControlStateNormal]; [btnBack.titleLabel setFont: [UIFont fontWithName:@"Courier" size:15]]; btnBack.layer.cornerRadius=5.0; btnBack.layer.borderWidth=2.0; [btnBack setBackgroundColor:[UIColor colorFbBlue]]; btnBack.layer.borderColor=[UIColor colorFbBlue].CGColor; [btnBack setTitleColor:[UIColor whiteColor] forState:UIControlStateNormal]; [btnBack addTarget:self action:@selector(Click_On_Btn_Back) forControlEvents:UIControlEventTouchUpInside]; UIBarButtonItem *backBarButton = [[UIBarButtonItem alloc] initWithCustomView:btnBack]; -(void)Click_On_Btn_Back{ [self dismissViewControllerAnimated:YES completion:nil]; } ``` This is how i push segue from previous view controller. ``` if([segue.identifier isEqualToString:@"segueFbShare"]){ FbShareViewController *fbVC=[segue destinationViewController]; fbVC.imageUrl=self.product.ImageUrl; } ```