PGP --> PHP

Hello Everybody, we have a problem to implement a PGP-function into a PHP-Script. PHP 4.0.6 as CGI, Apache 1.3.11, FeeBSD 4.2 a) PGP from the command line works: % pgps -ato test.sig test.txt -z passphrase b) Calling a little PHP Script $kommando = "/usr/local/bin/pgps -ato test.sig test.txt -z passphrase"; exec("$kommando",$antwort); to do so, also everything works fine: % virtual /usr/local/bin/php /etc/test-pgp.php Creating output file test.sig X-Powered-By: PHP/4.0.6 Content-type: text/html c) But when we use this very same PHP-code within a script, and call this script through the web, it's not working anymore and the error_log says Cannot open configuration file pgp.cfg Cannot open secret keyring "secring.skr" Cannot open public keyring "pubring.pkr" Why is that and can this problem be solved ? Thank you very much. Juergen