Did you try taking testosterone supplements as well?
I use Rogaine and take Propecia. I have no issues with either, though I know there are a lot of side effects with both. I didn't start taking them until I was 29, and I wish I would have started when I was 20 when I first started balding. I have regrowth in the back, but my hairline is not where it was when I was young, and its not regrowing there... though it also has stopped going any farther back due to the foam and pills.