How to use CFschedule?

I am trying to send an email with CFschedule... from what I can tell by looking at the documentation, I am doing it right. I am not getting any error messages but the email is not sending. The CFschedule is the action page of a form. When the form processed, it should set the CFschedule for another action page which sends the email. Here is the code -

The code that fires on a form submit (I have verified that this page is being called properly)

<cfschedule
action="update"
task ="sendemail"
startDate ="3/18/2014"
endDate ="3/18/2014"
operation = "HTTPRequest"
interval ="once"
url = "sendemail.cfm"
startTime = "10:43:00">

And the action page.

<cfmail     from="xxxxx@xxx.Xxx"     to="xxxxx@xxxx.xxx"     subject="Your Equipment Test"> 

Your equipment lease is due back to CIE tomorrow.   </cfmail>

Thanks!