A: 

@user3171192, I think there would be problem is you does not passing UserID and Password with NSURLRequest to your web service.Therefore it could may be not give you response of the connection. Please use

In the portion of -(void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data { [responseData appendData:data]; NSLog(@"Response of web service %@", responseData); }

You will get exact response of your code in GDB. I hope so you it will fixing your problem. Sorry for English.

RRB