Behringer ada8000 major Delay issue

[alarmstudio]

I have a digi002 protools version 8 hooked up with two lighpipe cables (in and out) to the behringer ada8000. My main mixing console is a mackie digital 8 bus D8B. The reason for this set up is that i can take 8 analogue outputs from the digi 002, and i use the behringer ada800 to convert the adat to 8 more analogue outputs. the problem is that on the 8 channels coming from the behringer there is a major, major delay. on the vocal lines the first syllable is misssing. the sound itself is perfect , it's just missing the first second or so. It's almost like there is a really high gate effect on the vocal. the same happens with any other instrument send via adat to the the behringer. I tried replacing the cables, different sampling rates, 44.1 and 48. I've set the digi002 to master, and tried it as slave. nothing makes a difference.
any ideas??

thanks!