If by safety wire you mean the lever safety, it sounds like the lever safety is not being pressed up by the lever. Look behind the trigger, there is a small pin the comes out a hole. That pin is really a little device that blocks the trigger so the gun won't fire if the lever is not closed all the way. The next time it won't go boom, make sure your lever is closed all the way and it is pushing up that little pin. You don't have to recock the gun, just look at it and see. If the lever is closed all the way and it still won't work, you'll need to pull the stock off and look inside to see what's wrong with her. Good luck.