Shoutbox

Hi guys i need help.
When someone try to send a mp3 files ... my msn messenger 7 final says something like that:

<< usernamei@hotmail.com is trying so send you a file  (name.mp3).
This file is blocked, becouse is not secure.>>

I've patched my msn with  the last version of messpatch0777.exe
(I can send mp3 without problem)

I wanna know if this is my problem... becouse i can send mp3 to anyone without problems

thanx.