Finally got this working. Went into the DC3 passenger Panel config. file and replaced the Altimeter with A Carenado altimeter out of a F33A Bonanza. I'm sure other aircraft altimeters would also work. I used the same coordinates as the original and that was good.
Same thing for me. I uninstalled the program and reinstalled it still no luck. I then went into the panel config. file and disabled the original altimeter and replaced it with a different altimeter from another aircraft and it still didn't show up.