Hi John,
Perhaps the following will assist you in setting up the system to send faxes. Remember that sending a new fax is like creating a new fax from the computer's perspective - it only a matter of whether or not you have information already available to fax as opposed to starting from scratch. http://www.ehow.com/how_6503771_send-fax-windows-vista.html.
Here's an additional article that essentially says the same thing: http://www.ehow.com/how_6795144_use-scan-fax-send-fax.html.
I hope this helps.
Good luck!