Setting up a wireless connection on a Dimension 8200 via USB adapter.

First off, I haven't used the machine in almost 6 years but I'm thinking of hooking it up to a new TV for Netflix and whatnot, since I have it laying around not being used.  At this point I'm stumped.  I've tried almost everything I can think of and I still can't get the browser to work.  The software installed properly, I connected the USB adapter(Netgear WNA3100), it picked up my wireless network and even says it's connected.  Then I tried to open up IE and the page could not be displayed.  The browser will not connect neither will any of my chat clients(AIM, Yahoo, etc) or the MYMSN thing(I tried every avenue to prove it really was connected).  The Network Connections tells me that my wireless is connected and running a strong signal yet nothing.  When I first plug in the USB Adapter it says that my IP Address is all zeros so I choose to "repair" it and it gives me an IP Address but also tells me that there is an issue with it and that I should contact the ISP.  I have it set to choose an IP automatically, no other connections are available and the WAP is stored.  When I try to run the Connection Wizard it still wants to connect via the dial-up modem or a Broadband / LAN connection.  Am I doing something way wrong here with trying to use a USB adaptor on a PC this old?  Do I need to disconnect the dial-up modem for it to not be recognized?  Basically, am I wasting my time?  Ha.  All help is VERY appreciated.

Thanks, 

Jonathan

Also, seeing as I want to use Netflix through it should I consider upgrading the video card?