You must have missed the ActiveX install because Internet Explorer 6 & 7 are the only browsers that work with the WVC200. Try closing out IE and then reopen it. Use the link to your web cam. After you click on the View window, there should be a line on the top of the IE window indicating an ActiveX component needs to be installed. Install it. Once complete, you will see your video.
For whatever ridiculous reason, linksys decided that the wvc200 was only going to be viewed through IE. Who knows why. That means ONLY Internet Explorer can be used to view the WVC200.
Actually, Mozilla Firefox will work but you need to install the "IETab" add-on and then render the page as IE (left-click the Firefox logo in the bottom-right to render the page as IE and then install ActiveX). Also, you can view snapshots but not video from a smartphone with IE capabilities (I did not try Minimo from my Palm Treo) by browsing directly to the camera's IP though you need to add the page for mobile phones ("/mobile.htm" I believe).