About thread connecting webservice method problems.

I do not have time threads.

- Will jump back (void) CallWS method completes - (void) connection: (NSURLConnection *) connection didReceiveData: (NSData *) data of these methods come inside, and then I do the xml processing.


But I put him inside the thread. [SelfperformSelectorInBackground: @ selector (CallWS) withObject: nil];
It does not jump to the following connection methods that go. Why is this so?
Reply:
Code made up, but so is relatively difficult to judge where the problem