I am newbie.
Everything seems to be OK during installation.
But after installation, I get the following error:

Fatal error: session_start(): Failed to initialize storage module: user (path: /tmp) in /home/tumak/public_html/phopen/class/class.opnsession.php on line 289

Note:
I installed OpenPHPnuke in subdirectory named 'phopen'.

Please can someone tell me what is wrong?

its a php setting (php.ini).

this shows to a directory where the session information is stored. Hower that dir does not exists (or you have not the right to write in that dir)

Alex