Calling A Coldfusion Template

On the server i am using a asp script to loop thru an xml file that contains a number of email addresses. When i pick up a email address i would like to call a cfm template that sends the email. I have tried the below:

Server.Execute("sendemail.cfm?Email=john");

but it gives me a ASP 0231 error. i suspect that i can only call another asp script. Interestingly i only get an error when i use the string parameter any thoughts? i would like to use CF as the mail delivery vehicle.