Pat, I am NO expert here! and believe me I should be at this point as I have many issues with my AFS/G3X setup. As with everything....all me!
Luckly, the AFS support (Trevor) and Garmin (Matt) will not sleep until they have helped you.
But - I would go to the AFS screen and select CHECK> MAINT>ABOUT and look under the current position to insure no LONG/LAT coordinates are listed and is showing all 00000's as probably is since you have NO GPS.
Then go into the admin settings and look at line's 10, 11 and 12 for GPS/NAV settings - for me 10 is set to Serial port #1, 11 is Serial port #3 and 12 is NONE.
You can also look up at lines 5,6,7 and 8 and make sure your Serial ports are properly setup - again, I am set like this 5-NEMA/AVTN, 6-TRFC/ICARUS, 7-SL-30 and 8 is ARINC.
I hope this helps a little...its the best I can do for you until the real experts come to your aid.