xsan 3 warning: "check fibre channel cables"

I have a warning on 2 of my clients in the computers window of xsan admin 3.1. Under status column it says "check fibre channel cables" . However, both cables are operating properly, displaying active lights on both ends, and I am able to access the SAN with no problem. Does anyone know why I am getting these warnings and how I can get rid of them. Also I have two other clients that are showing "unreachable or offline" under the status column. However, they have full access to the SAN. All computers are running and connected via the private and public LAN and fibre.