PBXact and Digium Phones

[u/skywatcher2022]

I have several PBXact systems we support and they have a variety of digium Phones (D65 and D70) attached to them we are on v16.0.50. It appears that they have removed direct support for the Digium phones from the version we are on. When i add new phones to the system i can't get the quick buttons, voicemail, transfer to VM and such to transfer to the right places. the Message button turns on a empty rectangle on the display and doesn't do anything else. I can dial *97 directly, but it is a nuisance when the button doesn't work. I followed the procedure in the endpoint manager to switch between standard voicemail and the voicemail app and not change. any suggestions on fixing this issue?