Thanks to all for the replies. Ive read those articles on the two links you gave me Sam but I had already tried all the ones on the microsoft route. I think I will have to bone the tech support at QNAP for a reply.
I downloaded winscp which accesses the nas via ftp and comes up with either a windows explorer or a norton commander type pane with all my files on the nas and anyone I specify on my pc, works a treat. Thanks for your time I might be back
Phil