Yeah the BY guy who phoned today asked me to try updating the ethernet drivers.
So I downloaded the latest nforce drivers for my nforce 2 chipset even that didn't help.
He also made me download a TCP/IP speed optimiser program off www.speedguide.net and try changing the speed settings from 3mbit to 10mbit on my ethernet card but it still didn't make a difference.
I'll try your last suggestion with the LAN and get back to you.
Again many thanks for your advice.