[Freeswitch-users] Help with home setup

I have been trying to get this working for the last week and would really appreciate your help. I have a pfSense 2.0 server with Freeswitch and FusionPBX installed. I followed the instructions at http://wiki.fusionpbx.com/index.php?title=PfSense_Install and can access the web GUI. My goal is to use a Gigaset C610A-IP connected to my Google Voice account. However, my first failure seems to be the most basic: through FusionPBX, I created a user and extension to use with the phone but I can not register it with FreeSwitch. So, how do I get the phone to work so I can test that the basic functions of FreeSwitch are working and move on? Thanks!