audio player – standalone version – doesnt work in IE

hi. i have use the standalone version at this site https://www.moonandsun.gr
it works gr8 aat FF, Opera, Safari
but as usually at IE (IE8) it goes and shows the alternative content…even though that i have installed flash etc..and also that doesnt happen only to me but also to other users that use IE…any ideas how to solve this matter pls?

ty in advanced.