Won't recognize 3rd Antminer U2

[JetMech]

I've been running two U2s on a powered USB hub for a couple weeks and just added a 3rd today but bfgminer isn't finding it. It has the same driver installed as the other two, but only the red light comes on. The green one doesn't even flash when I try ALL or AUTO from the Add Device within bfgminer. I'm using bfgminer 3.10.0 and the driver is Silicon Labs cp210x usb to uart bridge driver 6.7.0.0

Any suggestions?

[lowbander80]

must be a power issue your hub is not power full enought to run it
get another hub