You Aren't Getting Sleepy

I have trouble sleeping.

I can remember as a child getting up very early for no reason other than it was time to get up. When other people are tired and can go to bed like that at 7pm and wake up 15 hours later, I have to stay up a certain amount of time before I can "wind down" and even then it's hard to sleep.

It's still hard for me to sleep. It's been better since I've been on anti-depressants, but still it's hard to fall asleep.

Now I find out it might have to do with Aspergers.

This all makes me wonder: what is it about the autistic brain that makes it hard for them to fall asleep? Does anyone else with Aspergers or any other autistic disorder have these issues?

Responses are greatly appreciated.