What is the model of your wifi router? you might have set it to allow only certain devices at your home e.g mac/ip addresses. Linksys with ddwrt firmware has Mac Filter feature in which only certain mac addresses are allowed to connect. Access Restriction do the same thing.
Have you run a Site Survey and/or Wi-Fi Diagnostics on your Torch to see if there is problem with your router? Go into the Setup Wi-Fi screen and click Menu->Troubleshoot. Most routers ship on channel 6 so if you simply unboxed your router and plugged it in, it is probably clashing with a neighbor. A site survey will show all routers in range. Try changing your router to use channel 1 or 11. Wi-Fi Diagnostics will show why your Torch can't connect to your router, or why it can't authenticate, or why it can't reach the BIS server.
The Wi-Fi forum is a treasure trove of advice for solving connection issues. You can try rummaging through the posts over there too for ideas.
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