Well, may be people has nothing to say about your songs, or what I know...
Just wait.
I'll post something in your song.

       > Iszil

just some patience may help.

also if you post to (a lot of) other people's songs, they are likely to check out yours and if they find something to say, they will.

I haven't posted to your song yet and I won't for a while, because I don't have anything to say to it right now. Just that it sounded chaotic at first play.