Your best bet is to download a copy of the manual and check the regulator control. This can also be due to using an indoor or worn out spring on the bolt. Be sure to clean and lube it up with some good marker grease.
Spyder Imagine Paint ball guns run on a different system than most traditional paint ball guns. I suggest you make sure the chamber and barrel are perfectly clear. Then don't tamper too much with it and take it to your nearest dealer to look at.
