Changes in Menu

Hello again, I have an issue, in a faq in this forum I found that the hex code for palette 09 is 12 but when I change terra palette 02 in windhex for palette 09 (the code is something like 430002 in hex I change the 02 for 12 so it will be like this 430012) but when I run the game the palette doesn't change, I tried a lot of codes like 0A, 0B, 0F, 10, 11, etc... but no one pass the palette 07, I mean, when I change palettes from 00 to 07 there is all good but if I want to put a palette 08, it puts me another palette and there is the same with the palette 09 please help me :S