hello again,
i'm still confused with this problem,

now i should now what's the exact different with the files that ccody did convert, and the one i ddi!
all programs shows that they have the same properties!

may be this information will help to solve the problem:
some of the files work correctly, like: 001.mp3
and others just work in few seconds, like 005.mp3 , it's good for the first 7 seconds, and then enter in noise, but when using headsets all goes ok.
so, what's different in the first 7 seconds ??

the files list:
http://server13.mp3quran.net/jhn/