#1 setting IDv2 artist doesn't always work

[jujo_si]

Hello,

I have a totally valid mp3 file, here it is
http://www.geocities.com/jujo_si/Toni_Storaro_-_Gol_Sharan.mp3

and i try to set the artist and title in ID3v2, here is
my code :
http://www.geocities.com/jujo_si/SetArtist.java

It doesnt work, while it works with some other files,
on some file it doesnt.

I try to remove the tags from winamp and run the code
again but it still doesnt work.

Can you tell me what the problem is ?