Presario SR1901WM Onboard LAN Problem

Hi. I'm not sure if this is the right section to be posting this in or not. But, I recently subscribed to cable internet, but cannot connect. My ethernet adapter seems to be non-existent now for some reason. The tech guy from the cable company that hooked it up never bothered to see if it worked, just connected and left. I have tried installing the original nvidia lan drivers from HP's website, but still didnt work. When the cable is plugged into the port it lights up and appears to be active. But in the device manager there is nothing at all for networking. Any ideas on what I can do to get the adapter working?

Motherboard 09/19/2006-C51-MCP51-A8N-LA-00
Copyright 2006 by Hewlett-Packard Company Rev. 3.11
DMIMOBO: ASUSTek Computer INC. NAGAMI2L
DMISYS: Compaq Presario 061 RB063AA-ABA SR1901WM NA630

CPU Type: AMD Sempron, 1800 MHz (9 x 200) 3200+

Package Type: 939 Pin uOPGA

BIOS Properties:
Vendor Phoenix Technologies, LTD
Version 3.11
Motherboard Properties:
Manufacturer ASUSTek Computer INC.
Product NAGAMI2L
Version 2.00

Thanks.