[Mediawiki-l] We could not process your edit due to a loss of session data

Hello,

I moved to CentOS 5.3 to Fedora 10. I backuped my wiki database.

I reinstalled mysql and httpd. I copied the sql dump into the freshly created database. I moved LocalSettings.php, installed the Wiki and put back the LocalSettings.php in mediawiki/

I could not save any page. I get the message :

"Nous ne pouvons enregistrer votre modification à cause d’une perte d’informations concernant votre session."

which in English seems to be :

"**Sorry! We could not process your edit due to a loss of session data. Please try again. If it still doesn't work, try logging out and logging back in."

Could somebody help ?

Thanks Francois Colonna