Are you able to access the screen when you are logged in as the actual Admin, or is the monitor not accessible to any user through any log-in/ environment? Have you attempted to access the monitor with the highest level of environmental variables (Full Access User)?
I am trying to isolate the problem, to do this we have to take out all the variables. This is one of the first steps to isolating the issue. Let me know, and I will pursue a resolution as soon as I hear back from you.