Finally got it working. Here's what I learned from Media Mall:
some application or setting on your PC is blocking our application from accessing our registry key (HKLM\Software\MediaMall) from our device accounts (MMT1, MMT2, etc). I am not sure what is causing it...we have never seen this before on thousands of PCs. Can you check the effective permissions on this key for the "MMRD Users" group?
You may also try to add MMT1, MMT2, etc to the admin group as a workaround to see if that "fixes" it.
So I added "MMT1", "MMT2", and "MMRD Users" to the HKLM\Software\MediaMall registry key and gave them "Full Control" and the server status now shows "Running". I'm not sure why these were not in my registry in the first place.
Anyway Active-TV is working now on both my PCs