Autorun

Ok I burned a simple Cd and wanted to a add a simple autorun flash animation in HTML form.
In the main directory I had my icon.ico,autorun.inf,index.swf and my index.html.
I burned the Cd and when I insert the CD it doesn’t autorun.
If I manually play the index.html then is does play,but it doesn’t auto run by itself.
What am I dong wrong?
Thnx :->