A5 not shooting auto

I recently installed a low pressure kit and the regulator and i just got paint to test it out b4 i go out tomorrow and it wont fire automatically, i have to pull the bolt action back everytime to fire, any ideas on what t he problem might be, also the low pressure kit wont hold air in the system like it did when i first tried it without paint after i installed it. The flatline barrel i have has a few scratches in the barrel and im assuming that could be a reason why my paint flies erractically. Any ideas would be appreciated, like i said i'm going out tomorrow and it would be a disadvantage having only 1 shot at a time......thanks

ok i tried diff pressures but it still doesnt automatically reload the bolt action lever, i just got the tank filled yesterday so there should still be enough pressure in the tank itself