Persistent muc rooms lost on service restart

Hello,

I'm using Openfire 3.7.1 on windows server 2003 with standard setup (embedded database).

I have created a few persistent rooms but they are lost each time I restart the openfire service. I dont' understand why since all other settings (including group chat services) are persisted.

So any idea why the persistent muc rooms are not persisted in the embedded database?

Thank you,

Arnaud