Can’t connect to server by server name but can through server IP

Hi,

I have just configured a Nortel LG AX-IAD100 router/modem and all our PCs on the newtork can access internet and email.

3 of our PCs (running XP) cannot connect to our server (small business server 2003) using the server name. Although these PCs can connect using the server IP address.

This is causing headaches with printer access etc. And all was fine using our previous Belkin router/modem.

Please help – I’m stumped.