Double post, but problem solved, I took apart the hop up and then just put it back together and problem solved. However the set screw was not where it should've been. There was nothing there. So it looks like it's time for a new hopup kit, probably the King Arms one.
Now, I have noticed another problem. The part highlighted in red below has broken and to each side of the problem area is a different piece. Basically the frame is in two pieces. Is this normal or has it been broken? Also, is a little JB Weld okay to lock the two back together?