have you set up your DNS server file? you need to put the IP address of your ISPs DNS server into the /etc/resolve.conf file so it looks like this
Code:
nameserver xxx.xxx.xxx.xxx
nameserver xxx.xxx.xxx.xxx
That shows two servers and linux will start at the top and work down until it finds one that works.
HTH
Alex
P.S. this is in the forums already i think