Trap in NETBEUI

My AMD Dual-core machine (Asus A8N-E motherboard with on-board 
networking function in nForce4 chipset) keeps giving me a Trap 000d when 
I try to back it up across the network. On one occasion NETBEUI was 
referred to specifically.

I don't seem to have any problem accessing other machines on the LAN 
from this one.

I am using ver. 1.7 of the GenMAC wrapper.

Any ideas?

-=-