The IA32 label on NVidias site is used for the graphics card. You also have to install the Nforce Platform drivers for network (nvnet).
It appears that the nvnet driver isn't being found. Check to see if it is installed with ls /lib/modules/`uname -r`/kernel/drivers/net/nvnet.o - if it reports nvnet not found then the driver is not there.
There are numerous threads on nvnet and network on this site that should help in addition to the Nvidia documentation.