Sorry to hear you are having problems.
It sets the value to
~ when starting up then calls the Quintonia server to update it, so it sounds like it's not connecting from your region.
First thing to try is to click on the HUD and select
Account then
My XP and see if that shows anything as sometimes that can get it going.
I don't think it should matter but it may be to do with a setting in your OpenSim.ini file for that region. In the [Network] setting is an entry
ExternalHostNameForLSL = which may need setting if it isn't already, maybe check your and your hubby's settings?
[Just in case you haven't seen this]
The HUD should give you XP when worn assuming it's not showing paused and/or showing a red border around it (or just on the left)
There is some information on using it at
quintonia.net/information/user-guide/chapter-4-hud and
quintonia.net/information/user-guide/chapter-4-hud-2
As you wear it there is an indicator that should slowly fill up and then you get the XP when it is full (the speed of this is controlled by the Eat interval setting)
If you go to
quintonia.net/profile/my-xp and click on the Latest activity tab you can see there if it's showing any entries with Farming in the Action column.