Did you place the files in the right locations?
descr_souns and descr_sounds_music in the data-folder? Should happen automatically if you merged the contents of the data-folder in the music-download. And then it's the descr_sounds_music_types in the data/world/maps/base-folder.
The songs must be in MP3-format, you need to only have one music-folder inside of the sounds-folder and you have to remove the files you stated above that you had removed. Make sure every song is also renamed to the correct numbers.
If that doesn't work i'd guess you have your mod inside of program files (x84)? Move it outside of that folder then. If that doesn't work it's either your system or you have done a mistake.