[PROBLEM] SAMBA with USB mountet Device under RC3

[Cre@tsheR]

Hi all,

I have an externel HDD plugged into the USB-Port, which is mounted and I can find it in my Network.
But I can't write on the HDD.
I already checked / edited the /etc/usbmount/usbmount.conf, but it looks like it doesn't care xbian what config is made in this file!?
Is there already a solution and I'm only blind?

greetings

Cre@tsheR