You might want to add
alias eth1 <modulename>
to your /etc/modules.conf file but put in the actual module name of your card. Is the second card different from the main card? If so, you'll probably have to modprobe <modulename>
to get that set up. You'll probably want to edit your /etc/rc.d/rc.modules file to get rid of the # marks at the beginnings of the lines with your modules for your NICs:
should look like this when you're done:
This should get your second NIC detected. If I've missed anything, someone please correct me. Hope this helps.