Terraminer IV through USB / BFGminer problem

[g.sphinxtah]

I am currently mining using the network interface on my Terraminer IV's ... I want to run them through USB with BFGminer. My device manager shows that there aren't any drivers installed for the miners. I have 6 TerraminerIV systems all hooked through a powered USB hub. When I try to run my mining script, it hangs while searching for devices, then BFGminer just times out. Is there something I'm missing?

[-ck]

Only cgminer runs Cointerra TerraminerIVs.