Here is another very-new-noob who is experiencing (at least moderately) this same thing. I started by just wanting to be helpful. Then after realizing that I need reputation points to post comments, I started focusing on unanswered questions, hoping to get up-voted for helpful answers.
It seems like some people ask a question and then just forget to vote for any answers at all. I've even started learning concepts on the fly, to try and answer questions that I previously had no knowledge of (LINQ for example). I think I will stop trying this though.
I've done my best to follow the rules, make my posts meaningful and helpful, and not repost what others have already said (even though I have on a few occasions).
As of right now, the ONLY vote I have is a down-vote on an answeran answer I provided that, at the time, I thought was a perfectly acceptable answer.