Ethernet cnet ProG-2000s problem

[César Amaya]

Hello, I just installed freeBSD 6.1 on a HP Compaq dc5100 MT and I added 
a Ethernet adapter Cnet ProG-2000s to the system but when I connect the 
UTP cable to the ethernet card its status says no carrier. I know the 
ethernet adapter is fine, I even tried with another adapter of the same 
brand and model, but the result is always the same: no carrier.

could some body help me, please?
Thanks.