I'm not sure what you mean by "toes in". Your toes should be facing the direction you are going, as in pointed strait, not turned in towards the horse. And don't think of it as "heels down", think of it as, putting weight into your heels. A mistake alot of people make is to pull there toes up in order to get their heels down. Make sure you are pushing your heels down with your weight, not lifting your toes up. I'm not sure if that makes sence the way I wrote it, but it's in your distribution of your weight...
"Be a best friend, tell the truth, and overuse I love you
Go to work, do your best, don't outsmart your common sense
Never let your prayin knees get lazy
And love like crazy"