Not eligible for AdSense?

So I have been trying for a while to get AdSense set up for my Youtube account (http://www.youtube.com/user/MishmashGamez) but everytime I fill in everything and hit submit it highlights Country or territory: Canada and says "Unfortunately, our records indicate that you're not eligible to participate in AdSense at this time. Please be sure to review our program policies." What have I done wrong?
Not eligible for AdSense?

See original post by HaileyDH