CGI Error.The specified CGI program misbehaved by not returning a complete set of HTTP headers

Just installed php 4.0.6 on IIS 5.0, Win2kServer did the manual config. - regedit to file types executing at command line PHP works - (c:\php\php.exe c:\inetpub\wwwroot\intranet\test.php returns the correct output Tried mapping in IIS files to c:/php/php.exe %s %s and without %s Tried giving different permissions to the folder c:\php.. error message in full is: CGI Error. The specified CGI program misbehaved by not returning a complete set of HTTP headers. The Headers it did return where: ** NO TEXT APPEARS **. is this a permissions thing or somethign else? i have to believe the php.exe is ok and installed correctly because it works on commandline. any ideas? i'm not an IIS techie, so type slow for me. :) thx.