A problem with the movie End of Evangelion

I've download the movie from 2 different sources and have the same problem, the sound for the japanese audio is very small. Acutally, parts of it have normal sound, such as the background, but when the main characters speak, their sound is almost inaudible. The english and director's commentary works fine.

Any1 know the solution to this problem? or does the original dvd have the same problem too?

Well i dont know about the files u got but the original DVD doesnt have this problem.