Listen to me for a sec:
I'm new to this forum, but I've been running a music blog that runs ads for almost six years now. You won't see instant results in terms of ad revenues. I get a couple thousand hits a day & there are all kinds of reasons why ads don't get clicked.
People hit my page and something doesn't load. A lot of people run ad blockers. There's a lot that could be causing your click-thru's to be low, the biggest of which is likely that people are visiting your page without actually downloading anything. Hopefully you'll look at more than just the number of visits, you'll look at the depth of their visits and where they click, where they don't.
I give away free MP3's. Sometimes, that's all people come there to do. Yes, it's a bummer, but what can I do?
You're doing a great thing which I personally appreciate, so I've clicked on your ads & done my personal part. You can only hope that others follow suit, but don't blow your stack if it doesn't happen. It's not personal -- this is the web. Friendships are often more valuable than money out here. If I only ever did what I do for notoriety or attention, I'd have nothing. By doing a lot of giving without worrying about what I've gotten in return, I have more than I know what to do with.
If you quit because nobody is paying attention or doing what you want them to do right now, I really believe you're going to miss out on a payoff down the line. I don't know what it will be, but it tends to happen.
And I won't be offended if you don't follow this advice, I just share it because you're obviously passionate about this project.