ipad：崩溃的应用程序没有产生异常？

I am having this horrible crash out of my application that I have been trying to resolve for several days now. The code is an NSURLRequest to send a request to a web-service. I already use the web-service in production and I simply added this new service request. I finally added @try ... @catch around the offending code and it still crashes the application and does not "catch" anything.I am having this horrible crash out of my appli