Code keeps getting changed.

[XSFOX]

I'm trying to insert;

048A3670 88000000
C4213B44 0000FF01


But everytime I put it in and add it Dolphin changes it to;

048A3670 7FFFFFFF
7FFFFFFF 0000FF01


Why is it doing this and why won't it stop? Codes aren't working because it keeps doing this.

EDIT: Ok I tried altering it trough the game's Config file in Notepad and now Dolphin tells me this when I boot the game.

"Action Replay Error: Master Code and Write to CCXXXXXX not implemented (M)"



....? Does this mean it won't work?