First sorry for my english i'm french but i will do all is possible to be understood by every body

i've a little problem that i cannot resolved even if i have seen all post of this forum which are related to it.
My configuration:
Lacie mini disk ethernet 500go (last version of internal software)
Xbox360
I have installed it and i can connect from internet or LAN, i can upload or download files from windows pc. So the lacie mini disk works fine for all that points. Now i try to view audio files and pictures which are stored on it from the xbox360 and it's not possible right now.
When i am on dashboard of xbxo360 i can choose the data source (lacie twonky media server) and when i browse it i see only three folders which are:
All pictures
Data
xxx (i don't remenber the name of it

I go on each previous folders and there are empty!!
Could you please tell me if i have not applied a special something to obtain the share between xbox360 and lacie minidisk.
Thanks for your support
Luxskywalker.
