Autoscan problem with Synology DS212j SAN

Hello,

I need some help with my NTV550.
I just received my new Synology DS212j san and copy all my stuff on it...
I can see my share folder in NTV550, but no media found when i scan these share folder !!!

But if I manually browse by folder, it's ok... but very limited (for musik)!!!

Any ideas of what can I do to solve it ??

Thank you ... and sorry for my poor english :)