Hello. I need help with a GS code for Contra Shattered Soldier I found at this site.

The page I found it on your site is here:
http://www.absolute-playstation.com/...ier-cheats.htm

I created a new game, put in the Master Code, then put in the Infinite Lives Code, then put in the Invincible Code. Both the Player 1 codes ofcourse.

I saved the codes to my memory card. Then turned them all on. Then pressed start and started the game. However, big problem. The game doesn't start up. The screen just stays black after I boot up the game.

Can someone help me? I think the Master Code is screwed up because I keep on reentering the codes and it still doesn't work.
If someone could help me, I'd greatly appreciate it.

Thank you in advance.

I'm using GS2 V4 by the way.