easier than using the CLUA codes is to clear yr cache folder, yr temp and temp-data folders, and try from a save before you enter the graveyard - it's most likely just a random thing. otherwise it's some sort of romance conflict, at a guess - but try clearing the cache and temp folders first.
Done but it still dont work, and what do you exactly mean by "try from a save before you enter the graveyard"? i can't save after entering the cimetery.