I set up to shoot today, but my Diana 350 magnum would not cock. The barrel pulls down to 90 degrees to the receiver (right angle), but goes no further (and obviously won't "click" in the cocked position because it needs to go a little further for that). I had removed the stock a while back to oil all the exposed metal (to prevent rust), but no other disassembly than that. Just the three screws to release the stock, and then back on after oiling. Did I bump something? Did some pin fall out that I didn't see? It all looks pretty straight forward, but obviously something isn't right now. (And I'm not saying taking the stock off caused the problem, but nothing else has been done). I did see some pins protruding from the trigger assembly, but they were never removed. Could one of those have been pushed in or out to the "wrong" position by accident while wiping everything down with the oiling rag? Hopefully something simple that somebody out there has seen before. Thanks!