Problem getting PHP 4 to work on Xitami Server on Windows NT

I've been trying to Install PHP 4 for Xitami Web Server. I downloaded the Windows installer for PHP 4 and installed it. I edited the Filters for Xitami in default.cfg so that .php=D:\Php\php.exe (which is where php exists on my server) and I made sure that the folder which holds php.exe has execute permissions. I also put in "doc_root = D:\InetPub\wwwroot" and "extensions_dir = D:\Php" in the php.ini file and put that in the WinNT folder. I put my file 'test.php' in my cgi-bin folder inside my website root. When I go to test.php in the url, it shows the little loading thing in the corner for a bit, and then i get a blank page. I tried running php.exe on the file from the command line and it displays the results correctly in the dos prompt, so the file is written correctly. Any idea what i'm doing wrong? Thanks.