moodle and Internet Explorer plugins

[witch]

Sorry, this might seem a bit muddled but apparently our moodle does not display the correct buttons ete when playing an mp3 - you can see a start button,but that is all, no pause button or anything else. My boss, who had moodle at his previous school, is convinced that it is to do with ie plugins - but I have no idea about this.

My question is, if it is, how do I find out which ones, and how do I deploy it across the network (mixed XP Win 7) from a server 2008R2?

All info received with gratitude!