What are you using to run the .BIN, Alcohol 120%? Or such?
If the .bin is ran on a virtual drive, open up Windows Media Player or some sort of music playing program and see if you can play music by selecting the drive in which the image is mounted, if you hear something then the background music are CDDA files.
If that's the case, make sure the enable sound, enable CDDA Sound and enable XA sound are checked (from what you said, enable sound and enable XA sound should be checked already).
If you use Alcohol 120% as the virtual drive, go to the settings there and in the general options, make sure the Device control interface is set to "Windows NT/2000/XP ATAPI/SCSI Control Interface".
On the ePSXe's config CDRom settings, use SaPu's plugin if you have it and set the Interface Type to IOCTL/SCSI.
Dunno why, but that's how I was able to get CDDA music to work on my games.