One of your courses isn't working right for me

I'm currently taking your intro to WordPress course. I did the first unit, but the second unit did not open until 5/12--which is today. It's not locked--the box on the right saying when it will open is no longer there. But it's not active either. When I mouse over it, I'm just told "units will be available on their scheduled start dates." But today is the scheduled start date. Am I doing something wrong?