ROFL, seen this coming
Try re-adjusting your trigger, sounds like it isnt making good contact with the switch. Or set it back to stock, put 2-3 cases of paint thru it, let the seals break in and re-lube the bolt and the reg orings. A great video on re-lubing the reg is on you tube, I would post it here, but I think the guy is perma banned and mentioning his name is against the rules.
The name of the video is : Smart Parts Vibe Regulator Dissasembly / Reassembly