PHP Fatal error: Call to undefined function: session_set_save_handler() in /srv/www/htdocs/roundcube/program/include/session.inc on line 152

Hi list

I am running SuSE 10 Linux, PHP 4.40. Apache 2, mysql Ver 14.7 Distrib 4.1.13, for suse-linux (x86_64) using readline 5.0

But I am having issues with a PHP error

[07-Feb-2007 10:41:04] PHP Fatal error: Call to undefined function:
session_set_save_handler() in /srv/www/htdocs/roundcube/program/include/session.inc on line 152

Thus when I type in the browser http://localhost/roundcube I get a black page and no apache 2 errors But I get the above in ~roundcube/logs/errors.

I have checked my /etc/php.ini files and I haven't got a session_set_save_handler parameter.

Please advice as I'm getting close to my deadline and this is holding me up.

Cheers in advance.

Chuck