I have Windows XP Pro and use Outlook Express 6 as my e-mail editor. I sometimes insert a midi file to an outgoing e-mail thru Format->Background->Sound. When I try to insert an MP3 file thru same procedure, I can hear it myself as I compose my message right after I have inserted it, but it cannot be saved and cannot be sent with the message to my friends. What is wrong? How can I do this? Is there some other program that will do it?