Problem connecting wired & wireless desktop to Belkin wireless router

Hi guys, hope someout out there can help.

We have a desktop connecting to a Belkin router wirelessly. We also have another desktop connecting to the same router through a LAN cable.

Both of these desktops (running XP) connect to the net fine on their own. The problem is when I switch the wired computer on, the wireless computer drops the connection instantly! This does not give any error messages about IP addresses etc. It simply does not find any wireless connections.

I have spoken to Belkin who advised they will escalate to their level 2 support- but they havn’t got back to me. I have updated the fireware and tried all the different wireless channels.

Any suggestions guys?? Please?? This is driving me mad now!