Ubuntu 9.10 reached end of life a year and a half ago
. I searched the Ubuntu site and documentation for 9.10 is hard to find.
It shouldn't be too different from 8.04, for which documentation is still available: https://help.ubuntu.com/8.04/serverg...iguration.html
It's possible that, if the computer is only six months old, the networking devices are too new for Ubuntu 9.10. Try running the command lspci
in a terminal and seeing whether it reports the network devices. You might also try a Live CD of something much more recent to test whether the networking is detected.
Let us know what you find.