It just needs to be Lubed up most likely. The TM& has the same internals as a mini, and if the mini gets too dry, it plain won't fire. Take the gun apart, clean it with rubbing alcohol, and lube it real good with either Dow33 or hater sauce, and put it back together. If that doesnt work, make sure your ball detentes aren't too tight, sometimes they can actually pinch the bolt.
Paintball, how I miss you!