What is the processor on your netbook? An Atom processor is too slow to play Netflix with good framerate in Linux, in my experience. You will have better luck with Windows XP (or upgrade to a faster computer).
To troubleshoot your problem with "would not play the movie" try deleting the hidden folder (press Ctrl+h in the file manager to see hidden folders) called:
.wine-browser which will delete your profile and start fresh. Also make sure your system is fully up to date with the Update Manager.
This thread has some excellent archived advice on Netflix in Ubuntu:
http://ubuntuforums.org/archive/inde...t-2084592.html