Hacking cheat help with new firmware

[dragster215]

i just booted up the new firmware on my m3 real, but when i got onto my pokemon diamond cheats section, it just said that there were no codes for it.it was the same for yugioh championship 2008. i edied the xml file with notepad to put yhe yugioh cheats in and it was the correct format, but it says that there is no codes for each of my games!!whats wrong??

EDIT its a .db file

 

[dsrules]

make sure that the game id is correct..otherwise it can't detect any codes