Thank you for your help. I changed the MTU to 1430 and all now works. the only other problem I have is that the belkin wirless USB adaptor is rerecognised everytime i start windows, so I'm up to adopt ...
OK, I have just got a Belkin ADSL modem and wireless G router. I have unplugged the old speed touch USB modem and installed the drivers for the USB wireless fobs. I can connect to the router no proble ...