Strange since the Web Matrix server is the same app as Cassini. Its just one is fired up via Web Matrix and the other you launch from a command prompt. I loaded Cassini outside of Web Matrix and was able to serve your page just fine. Do you get this failure for all pages or just this page? When you first built Cassini using "build.bat", did it report any errors? This posting is provided "AS IS" with no warranties, and confers no rights.