Hi Castro
I would suggest you do like this :
1. Identify the Lan Interface using lanscan
2. Disable teh same by editing /etc/rc.config.d/netconf
3.stop and restart the netwrok services
4. check whether the card has been diabled .
5. remove the device files.
5. Switch off the system
6. remove the card
7. boot the system
8. Check for the device files , run a ioscan again if ib doubt , re check using lanscan
Manoj Srivastava