iphone - App gets crash on multiple NSURLRequest -

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i making app in calling web service of times. when more 1 web service call @ 1 time app goes crash, here code call service.

 url = [url stringbyaddingpercentescapesusingencoding:nsutf8stringencoding]; request = [nsurlrequest requestwithurl:[nsurl urlwithstring:url]]; nslog(@"request : %@", request);  [[nsurlconnection alloc] initwithrequest:request delegate:self];

also delegates.

i calling asynchronous still app crash. 1 have suffered problem before may me on that. in advance.


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