Well when I try to add a song as a attachment my comp usually freezes or just the site never adds the post and when it does it only adds the first few seconds of the song
Does this happen with everybody??

what size are the songs?

The one that I tried to add as a attachment was 3.77MB
Is that a lot??

The attachment system will only accept files up to 250k in size, as it's primarily meant for pictures, not music files.

If you can find some alternative hosting you can add a remote link to the file so that people can download it from here.

Which means you could attach about 1/15 of your song, about 16 odd seconds of a 4 minute track

megaupload.com is good for huge files

Just found this today a couple hours ago:

http://www.putfile.com/