Action Replay code DOES NOT WORK FOR ME!!! Can someone help me?

I can't get the Action Replay Code Inf Health in Battle to work. I typed in the code exactly as stated on this site AND on codejunkies.com. Yes, I do have the (M) code on (as well as the code in question), and I double-checked both the (M) codes and the Inf Health in Battle codes. I typed both in correctly. I can even type what I have on my screen.
(M)
f243bdd6
d8b1d250
3c27cda4
92b4ea91
Just to let you guys know, this is not giving me trouble. I tried other codes for this game and they do work. Just not Inf Health In Battle.

Infinite Health in Battle
a68179BF
2d550dc1
6ea0d147
4af41694
c198aaf6
06e11d84
1a40afc6
9ab37e75
1e27d83b
bbfb6923
So, why doesn't it work? Does it matter that I'm using these on a Nintendo DS Lite? It shouldn't, because it plays GBA games, so GBA cheat codes should work. Right?