Hola, i love playing with my PGP, but recently i have been having problems with it. When i go to cock the marker, i need to SLAM the handle back as hard as i can to get it to work. If i dont slam the pump arm back it wont shoot (no air is put through the gun). So, my question is, whats wrong with it? I really love using it and playing with newblets when i cant use my PM6 but right now its fairly unusable.