Hi ysun112. Welcome back!
You need to register for the 002 Group. This thread shows you how to do it, so here's a link to the right page: viewtopic.php?f=42&t=24921&st=0&sk=t&sd ... 45#p256328
It could take up to 48 to be accepted, but you'll have access to all the MP3s and the first levels of sheet music. When you reach 20 posts, you may register for the 020 Group.
Two ways to keep your post count up are to help in welcoming new members and to post comments on our members' MP3, Video and Score contributions.
See you around!