How can I fix my Action Replay DS?

My AR works fine until I try adding a game(as I had accidentally deleted all of mine....hehehe). I tried adding Pokemon Platinum and when I put in the game's ID code my screens start flashing with blue and red lines. But when I try to play the game WITHOUT the AR it works fine, but doesn't have any codes. Is it just the game, did it crash but can be fixed, or will I have to buy a new AR?