I let a friend use the rifle shooting at some swinging targets. I assumed he knew to load one pellet take the shot and so on. Well he loaded 1,2, and 3 pellets then must have pulled the trigger. The gun did not fire the pellets but I think it blew some seals in the block. Now the gun leaks the air to the point you can't fill the bottle. Anyone have an idea where I should start looking for the problem?