i foundout how to fix it. and what caused it; first what caused it is that the connection between your ds and cpu got interrupted somehow while you were doing something critical with your action replay

and second how to fix it is; reformat your actionreplay ds by when holding down A+B+START+SELECT while it is starting up and realease it when you see the main screen, it should work now...

NOTE: THIS WILL DELETE EVERYTHING STORED ON YOUR ACTION REPLAY DS