You're trying to use a SuSe RPM with Fedora Core. Chances are thats not gonna fly.
Since im not familiar with working with a 680i in FC6, which tends to have most drivers out of box, try these forums: www.fedoraforum.org
EDIT: I just searched there.... Try adding this to your /etc/modprobe.conf
options forcedeth msi=0 msix=0
and reboot. Maybe it will work.
ANOTHER EDIT: Remove that rpm too.
rpm -e nvlan-suse10-2.6.13-15.i686.rpm