Tippmann a5 leak

I recently purchased an electronic grip for my a5 and have an issue with a leak where the gas line connects to the grip. does anyone have a solution to this issue? I reconnected the old grip and have no issue with the leak. 

thank you. I tried some sealing tape to get a better fit with the thread, though its not leaking from there i was able to tighten it enough where i cant hear the leak unless its up to my ear. still confused as the old grip doesnt have this problem when i hooked it back up.

http://www.zephyrpaintball.com/media/img/zephyrsports/W1527-H852-Bffffff/tip/paintball_guns/update/tip_2010_t101043___flag.jpg i just googled an image of the a5 e grip. the part that leaks is the gold part of the gas line closest to the grip. i'm just baffled because it doesn't do that with the stock grip.

A drinking straw will amplify the air noise but your own risk because a sudden blowout would be very loud and painful.
I use a custom made stethoscope.

Whenever you buy a new marker it's always best to tear it down and replace all the o-rings. You can look this stuff up if you haven't done it before, it's a good skill to have. If it's an air leak issue it's almost always an o-ring. Check the ASA connection points at the other end of the gas line.

If you've already re-done the o-rings, it could be a small crack in the ASA adapter or the end of the gas line that it connects to. When the marker is dropped on that point it can be pretty stressful on the aluminum. Cheap replacement on tippmannparts.com

It's also important to know which A5 you're running (pre or post 2011) as well as which e-grip you have. Actual photos or a video would help.