Thank you Brion, you pointed me in right direction & I solved the problem.
The session save folder was not writable by apache.
For the benefit of others ...
Info on php sessions:
http://ca3.php.net/session
1) I verified that cookies worked on my client system.
2) On the server, I found out that no session files were being created in
the folder pointed to by the "session.save_path" php variable. This is
usually a permissions problem.
3) I tested this by making the session folder world writable. My sessions
now work properly.
4) I determined the apache "user" & set up the permissions properly to
avoid security problems.
>Peter Work wrote:
>As an anonymous user, I can create new pages, edit & save articles just
>fine. If I log in as a user or even as WikiSysop, I don't seem to be able
>to write back to the database. The SAVE button in the edit window is
>treated like a PREVIEW, I cannot change prefences. As WikiSysop I cannot
>delete pages.
PHP session support is broken on your server. Check the
session save path.
-- brion vibber (brion @
pobox.com)