CGI error - iis 4 system

I have recently inherited the responsibility for an NT 4.0 server running IIS 4. I was told to install PHP on the server. I downloaded the latest version from PHP.net and followed the install instructions. I created the test.php file as suggest and it ran perfectly, ONCE. I have not been able to duplicate it. I have gone through all of the help I can find and cannot seem to find what my problem is. I am getting the CGI Error The specified CGI application misbehaved by not returning a complete set of HTTP headers. The headers it did return are: Most solutions I have found suggest that it is a rights issue but I cannot determine what the correct rights should be. Any suggestions would be greatly appreciated. If I run the "php -i " command it scrolls what appears to be the correct html code. According to the install files that means the program is installed correctly Thanks in advance Shawn