The web site guy got back to me as I was typing the last post. This is what he found:

Quote
NOTE - If you are planning on using this or any other script for sending out emails, and it requires to run a process for longer than five minutes, you will need to purchase a dedicated IP from us. Please contact technical support to find out more information on running processes for extended periods of time with a dedicated IP.

I guess that means it won't work unless we purchase a dedicated IP