ftb3 nitepr help

ok so i recently started playing online and all is good. well i wanted to try out the codes i got from here in the official archive. i have nitePR rev k keep in mind. so i went into a game and selected the 2 codes i wanted to try. which was infinite ammo and no recoil. once i was in the game i enabled nitepr and checked to see if they workd. well they didnt work. idky seeing as their tested to work im assuming. anyone help me on why they didnt work? thanks