Offline files not working on NAS (Intel SS4000-E)

I have a notebook with Vista-Ultimate on it.
I have a Intel SS4000-E NAS unit in my network on wich all of my data
resides.
I have marked several files/folders for 'allways available offline' but when
I'm offline I can't open the files (not available)

I've read that offline files may not work correctly with NAS units, I've
also seen some postings about making changes to the 'samba' software ?? But
I don't know how to do that or if the SS4000 even uses Samba...

I'm not sure how to proceed, but I really, really need my offline files


Can someone help me ?

TIA,
Jurjen.