If its a PCI slot, try a different slot. Move the card.
If that card will work in a Dell box with RH9 and not the Netserver, then suspect problems with the Netserver motherboard.
If its under warranty or hardware contrace, get it serviced. Then try again.
SEP
Steven E Protter
Owner of ISN Corporation
http://isnamerica.com
http://hpuxconsulting.com
Sponsor: http://hpux.ws
Twitter: http://twitter.com/hpuxlinux
Founder http://newdatacloud.com