Trixbox Fax

I'm not having much luck configuring my Trixbox to receive faxes. I attempted to make an extension (for testing purposes) and set the Fax Handling as follows:
Fax Detection: FreePBX default (also tried system)
Fax Email:
Fax Detection Type: NVFax
Pause after answer: 3

The problem I'm seeing with the extension above is it doesn't auto-answer and therefore never receives the fax. Where in the heck do I set this extension to auto-answer? Am I missing something different?

I was able to set the general settings and receive a fax that way but that only allows for one path and the users will want multiple routes.

I'm running FreePBX 2.4.1.0

tia