[Spambayes] The spam folder is invalid: MsgStoreException

[ml at bortal.de]

Hello List,

we are using Outlook XP and Spambayes 1.0.4. When starting Outlook i get 
the error: "The spam folder is invalid: MsgStoreException: Exception 
0x80004005 (unbekannter fehler): Unbekannter Fehler"
I _guess_ the spam folder was renamed, deleted or moved. Where can i 
find out what folder spambayes is looking for in order to create it again?!
How could i fix this otherwise?

Reinstalling Spambayes did not help.

Thanks,
Mario