Leon is the top lever flush with the top of the action? If it is above the action that means the whole lever has moved up and isn't being held down, that is what the little screw does. If that is the case, the lever, yoke, rotary bolt and top lever spring are in a bind, the lever will be very hard to move. You probably can get a flat head 4-40 screw at your local hardware store to temporarily fix it. If that isn't the solution, the gun is going to have to come apart to find the problem, I am assuming the firing pins were OK.