Problem with my trigger frame,plz help

[Tim618]

My trigger frame is loose, i dont think its supposed to be, but it is, it moves from side to side, not the trigger, the trigger frame.Please help me out on any ideas of how to get it working and tightened.because theres only that one screw that i can see on the end of the trigger frame.
-Tim

[mlucasone]

take off the whole bottom part of gun, by removing the four screws. lift the board, tighten the screw into the frame, replace everything. bko right? i think it would be about the same with b2k