I would strongly advise you to check the manual.
The ASA leak may be the o-ring on your bottle/tank.
What output is your tank ?
A good starting point with an average tank output of 650-800psi is to ensure the marker is fully de-gassed and the battery is showing 100%, start with the LPR and turn it in (clockwise with marker facing toward you) until it sits a tiny bit proud of the LPR housing. Then go to the HPR and turn it clockwise until it stops (don't over tighten as you'll nick o-rings), then back it out 1full turn.
Then you can gas up and it should cycle and will most likely chrono around 230-250... It can then be fine tuned with the HPR over a chrono to your field limit.
Foot and Mclovin101 are far more qualified than me on these gats, so if I have given erroneous info they will no doubt point you in the right direction.