Optimizing Sound Please Help

[size=3]Optimizing Sound Please[/size]

[font=verdana, arial, helvetica][size=2]Fellows! Im having trouble with my flash presentation. I imported some mp3` as a voice over sound to my presentation. The presentation is some kind of tutorial page. Heres the problem. When I published it, the sound becomes awful. It has disturbing sound like echoes and distortions which is not a good effect. I tried configuring the publishing settup but it still not working well. I wonder is there any other way on how to avoid or improve the sound quality? Is there any optimizing techniques in this particular problem? I really need your help. I hope you give me a hand on this. Thanks.

Heres a the link of my sample presentation.