shouldAutorotateToInterfaceOrientation method not called in ipad - ios

Question

I am trying to get the orientation of device when the device is rorate. my code is works good for iphone but for ipad shouldAutorotateToInterfaceOrientation method is not called. i have taken tab view controller as a root view controller and below code i have written on first tab's view controller.
Source Code:
- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation
{
//[self configureForOrientation:interfaceOrientation];
return YES;
}
-(void)willRotateToInterfaceOrientation:(UIInterfaceOrientation)toInterfaceOrientation duration:(NSTimeInterval)duration
{
[self configureForOrientation:toInterfaceOrientation];
}
-(void)configureForOrientation:(UIInterfaceOrientation)interfaceOrientation
{
if (UIInterfaceOrientationIsLandscape(interfaceOrientation))
{
NSLog(#"Land");
if (UI_USER_INTERFACE_IDIOM()==UIUserInterfaceIdiomPad)
{
NSLog(#"Land ipad");
view_home.frame = CGRectMake(0,0,1004,768);
scroll_home.frame = CGRectMake(0,0,1004,768);
scroll_home.contentSize = CGSizeMake(scroll_home.frame.size.width,scroll_home.frame.size.height);
scroll_home.scrollEnabled = true;
btntitle.frame = CGRectMake(0,0,1004,52);
}
else
{
view_home.frame = CGRectMake(0,0,568,320);
status.frame = CGRectMake(0, 0, view_home.bounds.size.width, 20.0f);
scroll_home.frame = CGRectMake(0, 0, 568,430);
scroll_home.contentSize = CGSizeMake(scroll_home.frame.size.width,scroll_home.frame.size.height);
scroll_home.scrollEnabled = true;
btntitle.frame = CGRectMake(0,0,480,48);
}
}
else
{
NSLog(#"Port");
if (UI_USER_INTERFACE_IDIOM()==UIUserInterfaceIdiomPad)
{
view_home.frame = CGRectMake(0,0,768,1004);
scroll_home.frame = CGRectMake(0,0,768,1004);
//scroll_home.contentSize = CGSizeMake(scroll_home.frame.size.width,scroll_home.frame.size.height);
scroll_home.scrollEnabled = false;
btntitle.frame = CGRectMake(0,0,768,52);
}
else
{
view_home.frame = CGRectMake(0,0,320,548); //548
scroll_home.frame = CGRectMake(0, 0, 480, 568);
//scroll_home.contentSize = CGSizeMake(scroll_home.frame.size.width,scroll_home.frame.size.height);
scroll_home.scrollEnabled = false;
btntitle.frame = CGRectMake(0,0,320,48);
}
}
}