No input file specified

I'm running a couple of php scripts from the cgi-bin directory on Slackware linux 8.1, under apache 1.3.20. The most simple example of a script is: #!/usr/local/pkg/php4.3-withsnmp/bin/php <?php printf("Bob\n"); ?> If I install php-4.3.0, this will run fine, however compiling php-4.3.2 with the same options: ./configure --with-mysql --with-gd --with-zlib --with-snmp=/usr/local/pkg/net-snmp-5.0.8 --prefix=/usr/local/pkg/php4.3-withsnmp Gives the error 'No input file specified', in the browser window. This is not browser specific: pc055$ telnet conc1 80 Trying 144.32.40.21... Connected to conc1. Escape character is '^]'. GET /cgi-bin/testphp No input file specified. Connection closed by foreign host. The script will run from the command line without a problem: davidh@conc1:$ ./testphp Content-type: text/html X-Powered-By: PHP/4.3.2 Bob Any ideas what could be going wrong, or further debugging suggestions? I'm assuming it is not the web server install, as it works fine with 4.3.0. I need version 4.3.2, due to the snmpset bug in earlier versions. Thanks for any advice Dave Hartburn