I had a bunch of reg problems so Im "technically" a reg pro.. haha
First, You have to determine EXACTLY where its leaking from. Remove the grip from the regulator and then remove the trigger frame.
If you dont know how to do that, check out this guide and follow the directions for the trigger frame and reg...
After thats been accomplished, gas up the gun and see exactly where the gun is leaking, then post back... Ill be happy to help.
If you are confused about any of this; Shoot me a Private Message or An E-mail. We can even exchange phone numbers and text or whatnot.