Pokemon Soul Silver Cheats

I have got cheats for pokemon soul silver, added them to the system file on the R4 card, changed the names to cheat.dat and usrcheat.dat. On the DS it doesnt say when i press Y on the game that it cant find any cheats but no cheats are coming up.I have cheats for other games but they are in the ROMS folder. Will someone please help me!!!!Urgent!!!!

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