Hi there. I'm only into air guns for about a year, so excuse what might be a dumb question. I just bought a nice big compressor, an Air Venturi Krypton 4500. I set it up according to the instructions and was excited to see it fill my gun in about one minute--BUT, when I bleed the line so I can disconnect, the gun bleeds down too. With my previous small compressor, this worked fine. Turning the knob on the compressor to depressurize just bled the line, not the gun too. Any help sure would be appreciated. Am I doing something wrong?