behringer 4700 headphone amp and digi002

[studiokeyz]

Hey I was wondering could someone help with my cabling for headphone mixes. I have mon l and r outputs from my digi 002 going into the main in l and r on my headphone amp. The main l and r on my headphone amp are going 2 my monitors. I have that wprkin fine, my problem is the headphone channels. I can't control the volume with the main fader or for an individual channel. On the back of the headphone amp I have headphone 1 out going into an input on my digi 002, head 2 going into a diff input, etc, I did reaarage my studio setup today just can't remember how its supposed 2be.