I can search for your other posts, but to keep the data in one place - could you mention the age of your son and if he is on any medication.
I would suggest going to Trader Joe's or a similar type place and getting some chewable melatonin. Give the pill to him to chew about an hour before his bedtime.
I wrote a review on the site under health and wellness products on a chewable melatonin I bought online at Kirkman Labs - that would be a site to order from if you cannot find anything over the weekend.
Melatonin does not interfere with medications, Matthew took it a few times while on Geodon since I gave one to his brother and then he stopped after about a week. They taste like peppermint.http://www.bellaonline.com/articles/art33281.asp