How to install Rai (addon to SeaMonkey) in Slacko?

[NETTKNUT]

I want to watch DVD films on line from Lovefilm. com which requires Rai smooth streaming player. I have downloaded this as an add on to SeaMonkey without trouble but Lovefilm can't find it. I just get an error message 'Silverlight (MS default) not installed'. Has anyone got this going?. I am using slacko 5.3.1 on a pIII 666MHz machine with 500M ram.

[Semme]

Did you install through the addons manager? Perhaps you need one of these Moonlight plugins?