i am a student filmaker trying to record a simple soundtrack. i am going from a dat recorder to the four track. i believe that all the cords are connected correctly. when i record each track, that goes fine. however, when i try to mixdown, there is no noise, no sound. i can see the lights flash indicating sound, but i get nothing. what is my problem? is it the connections or the track or what? could it be that there is a problem with the tape the music is recorded on---the vu meter reads the sound at around -10...the far left. i have a big time limit and i have no clue what to do. please help