[Dovecot] Filter from Outlook fails after migration

We have some users which use Outlook 2003. After migration de Maildir from Courier to Dovecot, this user have some errors on their accounts because Outlook filters don't run.

Some of this folders name contain chars like '-' but another folder with only letters fails too.

Then ¿Does any people have similar errors with Outlook 2003?

Dovecot version 1.2.15