app delegate method is not calling after authentication

I have integrated google plus and social networking(facebook and twitter) plugin of prime31 in my iphone application. When I sign-in by button, it redirects for the authentication on the safari browser.when i successfully login and accept it come back to the application that work fine when app coming back it should call the delegate method

• (BOOL)application: (UIApplication )application openURL: (NSURL )url sourceApplication: (NSString *)sourceApplication annotation: (id)annotation { return [GPPURLHandler handleURL:url sourceApplication:sourceApplication annotation:annotation]; }

this method is not calling after authentication for google plus and facebook. while without prime31 plugin this method is calling i don't know what is a reason..