no connection, WWW or Email, even though Network Xtion shows plenty of traffic

i've been using a wireless connection successfully until i just moved. newly relocated, i am now using my T-Mobile Hotspot successfully.

i've attempted to connect via Cat5e to my roommate's modem and get no visible traffic (404 error, no Outlook Send/Receive).

i also connected to my roommate's wireless successfully, in that the WEP password let me connect, AND my firewall and Network Properties shows plenty of incoming and outgoing traffic - nevertheless i'm still unable to view websites and collect email.

i can't work off my phone - plus i'd like to learn what i need to know to troubleshoot this networking issue - can someone please lend a hand?

very grateful,

This website is not affiliated, owned, or endorsed by Microsoft Corporation. It is a member of the Microsoft Partner Program.