Phantasy Star Zero (J) stuck it bosses fight

after useing the cheat code to pass the character maker. the game is working fine but when i get to the boss fight the game take me to a white screen... :-[ im useing ttds{dstt} and have the latest update. and i patched the game useing DSATM. any fix for this? ???

You probably can't. White screens generally mean incompatibility.