I had my PM9 out to the range as I have many times. After shooting several magazines of ammo. I pulled the trigger and nothing. The trigger goes all the way and the trigger reset returns it to the fire position but that is it. On returning home I tried to disassemble the gun but after taking out the slide stop I tried to remove the slide but I am unable to as I can't fire the pistol. I am guessing I am not the first to have this sort of failure as I assume one of the parts broke. Any info on how to get the slide off and find what is broken would be appreciated.