help anyone who may know what the problem is! i finally got the mp3 player to work on my site but for some reason its not playing the playlist in which ive written up, it plays 400 other songs in which i dont know!

if anyone has an idea what the problem is the link is below
www.glue.umd.edu/~civileng
and then stroll down and click on the 'Tribute to Marley' link:( :( :(

The two songs which appear for me are:

1. Redemption song
2. Just One Of Those Days

What should be there?

Well those are the songs that should be there but the problem is when i access the webpage from 90% of computers they dont show up, i tried on my room mates computer and it worked is there some program that needs to be on the computer for it to work or is there another problem.