I've seen some great informative threads on here about the integrated NIC on the nforce2, and the lack of decent drivers for it.
Still baffled as to mines behaviour. When RH9 was released I nabbed the ISOs on-line, previously having RH8 CDs from a coverdisk or something. I'd fiddled with RH8 on my system, but was a little narked I never really got my old GeForce card to work properly with it. I'm a complete Linux Noob, whilst still managing to be a geek I have to mention, no concepts of "make" and stuff, only familiar with basic navigation at command prompt level due to some basic unix support I had to provide in a job a few years back. I couldn't get make to work or whatever with the NVIDIA drivers, having established that just installing the RPMs off their site screwed the installation every time.
Since I first installed RH8 (dual booting with XP), I've had to replace my motherboard with and 8RDA+ and recently upgraded to a Radeon 9800 Pro.
I re-installed RH8 from scratch after the motherboard upgrade, and managed to get my NIC to pickup quite happily once I'd installed the Nforce drivers off the Nvidia site.
A couple of days ago I tried upgrading my system to RH9. Upgraded a treat, fairly fast, everything worked.
Except the NIC.
Re-installed the Nforce2 drivers, having grabbed the RH9 ones from the web from inside XP ('net access is through a router), and burning them onto CD, but still no avail. It can't see my NIC at all. I then wiped the installation completely, wondering if it was something that happened because of the upgrade. Installed RH9 from scratch, still didn't work. Installed RH8 again last night, from scratch, and it works fine with the network adaptor.... very odd.

I'm still struggling to get 3D Accelleration to work with my
9800, even having nabbed the 9700pro drivers off ATIs website. The 9800 worked fine under RH9.....

Ahhh well, such is the joys of Linux

I have a similar problem like this. RH9, NVIDIA NIC isn't recognized. I finally bought an additional LAN card and it worked out fine. I also run XP, but it recognize it very well.. odd...
See my thread..

I have RH9 and Pavilion PC with AMD 2400+, NIC and 512MB RAM.
I have failed to recognize NIC of the PC in Linux. I installed an additional PC LAN with PCI, then I was able to connect.

I checked it with lspci and the following is the listed Ethernet, the second one is what I am using now.

00:00.0 Host bridge: nVidia Corporation: Unknown device 01e0 (rev a2)
Subsystem: Asustek Computer, Inc.: Unknown device 80c0
Flags: bus master, 66Mhz, fast devsel, latency 0
Memory at f8000000 (32-bit, prefetchable) [size=64M]
Capabilities: [40] AGP version 2.0
Capabilities: [60] #08 [2001]
01:08.0 Ethernet controller: Intel Corp. 82557/8/9 [Ethernet Pro 100] (rev 02)
Subsystem: Hewlett-Packard Company NetServer 10/100TX
Flags: bus master, medium devsel, latency 64, IRQ 11
Memory at ec1ff000 (32-bit, prefetchable) [size=4K]
I/O ports at c400 [size=32]
Memory at fc700000 (32-bit, non-prefetchable) [size=1M]
Expansion ROM at fc600000 [disabled] [size=1M]

Is there anybody can help?

Try downloading the source packages for your nForce2 board and then compile them. If you want to use the latest kernel in the future, your nForce2 board will work with that too.

You mean the nforce2 Linux driver from NVIDIA? I downloaded RPM package for RH9 and succesffully installed. Then nothing happens. Do you mean something else here?

Should I recompile the kernel???

No, source package. Down at the very bottom.

Dear Electro.

Yes, you were right.
I downloaded the source pacakge you mentioned and rebuild the kernel, then it worked.. However there was something strange things during rpm installation but it's O.K because now the system detects the NIC. I am writing this message with that network connection!! Thanks a lot.