I need help with the Silverlight plugin for Netflix please!?

I have tried installing and reinstalling the plugin multiple times until I read on a forum that an older version of the plugin worked better since the new version of Silverlight was not "compatible" with Windows Vista. I downloaded the old version and when I tried it in Netflix, it kept showing a playback error. I contacted Netflix and they told me that the playback error was due to the old version of the Silverlight plugin and then instructed me into downloading the new version. I downloaded it but now I am back to square one with it reporting that it is again crashing. Is there anything I can do to go back to watching Netflix?