I am a retired police officer and I carry a 1st Gen. 3AT every day. Each year I must qualify on the range for my HR218 certification. I have used my 3AT each year with no problem. This year I hardly got through the course. The problem is, I pull the trigger and the hammer goes back but does not release and fall forward to fire. I keep pulling and the hammer just goes back and forth with the trigger. I'm loosing confidence. Any one else have this problem?