I think that it only works with IE 4 or better, no Netscape or Macintosh support yet, were you using Netscape or a Mac? It was a very confusing download for me but I was able to view it in IE 5. In addition to the Metastream 3.0 update I also had to download some kind of component, I think it was svgml, though I dont really remember. Once the download is complete the Demo was very impressive. The objects load very fast and have great detail. bob