Samba not working anymore

[mindless]

Thanks for your answer, I'll look in this way to restart the server.

For the shares, I set up one share on my media hdd with the parameters guest ok = no and force user = xbian which previously worked as expected.
But this is one of the 3 shares provided by Samba (the other ones are the original xbian-backup share and the last one is the automatic usbmount share even if I disabled it in the usbmount.conf.
As the security settings are set for each share and not globally, it shouldn't ask me for credentials when entering the server but when entering on of the shares.

Any idea on this?

Thanks.
Regards.