Well, ok.
Let's try:
Go to DB2 folder and run DB THEME GOLD.mp3 manually.
If that works, let's try:
1.) Give me the song length on that file.
2.) Run DB, and press Ctrl+A in it when it is done loading. Let me know if you hear anything.
(you are not supposed to hear music on installation, you are supposed to hear it when you visit areas inside the program)