Hello Mr. Kaaku,
There is no secret or guide to getting more comments on your songs in the song forum.
I think the main thing you need to be is "realistic." By that I mean you need to recognize that the song forum is like a public place for you to converse and share with others. If you look at the demographics of the songs forum it is populated by a relatively small percentage of people that visit the CW Forums. In general the bulk of the submissions are of a general style and by folks who have been around for quite some time. This is just how it is, and that is something that you will have to accept. There is nothing wrong with this, or skewed against you, it is just that people gravitate towards the things, and people, they are familiar with.
I too am new to the CW Forums. I bombarded the song forums with 11 songs in the last 30 days or so. The first comment I had for a song was from Bapu, and he said my song was "weird." I was not put off by this, it is what he felt and it was honest. What i am trying to say is that you can not expect to much from the song forum. It is a group of people that all have a passion for what they do, and know what they like and don't like.
Some of your songs will get more reviews than others. Some of your songs may languish in obscurity. This does not mean they are bad, or nobody likes them, it just means that there is only so much time in the day to listen to music, and people will go towards the artists who have a track record and who have offered helpful critiques to other songs.
Just stick it out, and post what you want, when you want. If you are a true artist who is passionate about what you do then this should be the easy part. If folks comment, great, if not, then great too. It does not mean you are a bad artist, or bad person if others don't comment, and it doesn't mean you are the next Madonna if folks go gaga over your song. It actually means absolutely nothing, except that is is nice to hear someone likes what you do, and it is also nice to know if they don't (even though it may hurt a little.)
I challenge you to stick around for a year, and post the material you want to share, and then revisit this thread and see if you feel the same way as you do right now. You might be surprised.
Don't expect to be an overnight sensation, but by sticking to it you will accumulate some social collateral, and you may be responding to the next person who doesn't understand why nobody "gets me."
I love you man, because you came on like a lion, now don't go out like a lamb. Share your music, and your thoughts, and it will all work out for you whether you know it or not.
Jesse Q. Screed