I think if downloading the song is the way they register voting, then that's a lousy way to do it. I only clicked on your song, but if I'd been curious about any of the other ones, even if I thought they were terrible, it would still count as a vote for them.
Maybe you need to change the image of your band to a ...suggestive photo of a young lady. You'd get click through votes then. Of course, it wouldn't be for the music.
Russ
"There's nothing worse than people desperate to have fun."
-Patton Oswalt