Apple Quicktime to make MP3 player work

I have previous published a way to add an MP3 player to your blog so that you can have music for your blog at Adding Music to your blog. I received one comment from a blogger: "hey peter thanks for posting these topic...but i dont know why it doesnt work for me!...i have tried a thousand times, and i cant make it work!"One of the problem may be you do not have the proper plugin in your computer,