Forum:Eden Fight, Omega Blaze causes game to crash

Through out part 3, i couldnt use both Omega Blaze and the Frost one, i dont remember the name atm. whenever i did use them the game would crash apon trying to add damage. I ignored it at the time, concidering they wherent that useful anyways...but i didnt know that Omega Blaze was a Crucial/Scripted part of the fight against Eden later on. so im looking for help due to the fact that the most recent english patch doesnt fix it and no-one online seems to have had a similar problem. Help please? i would like to be able to finish the story