How can i dial a phone number using their phone number hyperlink in the contacts section of Windows Live Mail.

<Moved from Windows 7 | Network & Internet>

This functionality existed in outlook 2000 but i can't seem to find out how to make it work in windows live mail, Windows 7 pro x64.  The phone number is a clickable link, but clicking it does nothing.  I have a pci modem wired properly (tested with "dialer", i called my cell phone from the pc and when i answered the cell i was able to pick up the receiver on the land line and speak using it).  There must be a way to make this work, otherwise i can see no reason why the phone number would be interactive.