404 Error 99% because of DNS server address.
You should change the TCP/IP setting to manual.
just try sonething to verify if it is DNS problem:
open IE, try to connect your route, most time as http://192.168.1.1 or http://192.168.0.1
chack your book. If you can see something, then set the TCP/IP from property of the network connection.
Worst case, set IP address and DNS by hand.
use you XP, connect to the modem 192.168.2.1 you should see the DNS address of bell.