All Unknown CGI Extensions

Hi, I have a Windows Server 2003 Standard server. I downloaded and installed the 5.2.4 installer package for IIS CGI. Tried the test.php page I copied form another (Mac) server. Didn't work. Page not found error. I went through all the manual install instructions and verified that the automatic installer did it's job. There were a few discrepancies that I corrected in the php.ini file and the registry. NOTE: Before I installed PHP I had installed the new FileMaker Server 9 Advanced Demo package. There was a problem and I uninstalled it. This package installs PHP 5.2.1 on the server and creates registry entries. Uninstalling it removes PHP but not the registry entries. I found the IniFilePath key still pointing to FileMaker's removed install. I changed it to the correct path. The problem now is that I cannot get PHP to work without enabling "All Unknown CGI Extensions" in the "Web Service Extensions". Seems quite odd that PHP runs fine with the run all unknown option and not without. I checked the websites, for all the typical things. MIME, file extensions/types, default documents, etc. Help! Dan