Onboard LAN not working

[jellyrole]

My lan port isn't working on my motherboard, and I have been using a wireless adapter since I got it even though I'm sitting right next to the router.

Specs:
C2D E6600 3.2GHz
Asus P5K SE/EPU
XFX 9800GTX Black Edition
2x2GB OCZ Platinum 1000 RAM
250GB Hitachi SATA
Kworld 115 ATSC TV Tuner

 

[akhilles]

What error do you get?

 

[Homer Simpson]

is it enabled in the BIOS?

 

[AmberClad]

Did you install the drivers for the onboard network adapter?