Internet Sharing Problems

I recently set up a wireless LAN in my home, and I am encountering my first difficulty. The problem is that I cannot seem to make the following connection work:

(internet)-DSL Modem-US Robotics Wireless Router-US Robotics PCI Adapter-NIC-Hub-Xbox

However, this connection does work:

(internet)-DSL Modem-US Robotics Wireless Router-US Robotics PCI Adapter (connection stops here) NIC-Hub-Xbox

The problem is, every time that I set up a network bridge, my internet connection gets lost in the mix, stopping me from using Xbox Connect or Xbox Live...

In a nutshell, I guess what I want to know is how to take an existing wireless network connection via PCI and share the connection via the NIC.

Thanks in advance to anyone who can help me with this issue.

I think you're connecting the wrong things together. I'd say you wanted something more like this:

(internet)-DSL Modem-US Robotics Wireless Router-Hub

Then you plug the computer and the xbos directly into the hub (or the router, if it has its own ethernet sockets for clients). That way, there shouldn't be a need to have a network bridge on the desktop.