What is fedora 10
Ok try running kudzu
See if it detects your network card
Check in file /etc/sysconfig/hwconf
Search for NETWORK in this file and see if any entry is available.
If no entry is present then the card is not detected.
If an entry is available and driver is not known then the driver for the card is not available.
Just post the NETWORK section of that file
Also lspci will help
Also try "netconfig" to configure the interface.
Cheers
Zulfi