FX2 NICs showing 'disconnected'

we have some new FX2 chassis, with Dell PowerEdge FN 410S IOAs. we install windows on a couple of servers, and after installing the NIC drivers, they are appearing, but showing as 'disconnected'. we are unsure what step we have missed. there are 2 10G connections to each IOM in each FX2 (4 connections per chassis), destined for two separate VLANS. any suggestions would be appreciated.

thanks!