win 7 64 - logon to domain - folder redirection error

Hi,

when the user Paul (domain admin!) logs on from his Workstation (win 7 pro 64 bits sp1) to sbs2011 standard, the event viewer shows:

Impossible d’appliquer la stratégie et de rediriger le dossier « Desktop » vers « \\SBS2012\RedirectedFolders\Paul\Desktop ».
 Options de redirection=0x80009231.
 L’erreur suivante s’est produite : « Impossible de créer le dossier "\\SBS2012\RedirectedFolders\Paul\Desktop" ».
 Détails de l’erreur : « Accès refusé. ».

(translation: impossible to apply the Policy and to redirect the folder "desktop" to « \\SBS2012\RedirectedFolders\Paul\Desktop ».
redirection options= 0x80009231.
The following error occured: impossible to create the folder "\\SBS2012\RedirectedFolders\Paul\Desktop".
Error détails: access denied.).

The user is domain admin and the redirection of the folders to the server is activated. I tried to disable it, log on, log off, then re-enable it, but no change.\\sbs2012\RedirectedFolders is accessible from the server when logged as Paul, but not from client when logged as Paul. Also, it is not a firewall issue because the other shares on sbs2012 are accessible from the client when logged as Paul.

Any hint?

Thanks.

Alain Bourgeois