I've entered the 3 correct symbols for the code in this level (they turned green on each of the appropriate control panels) but in the room just outside this I still get "It's Off-line." There's nowhere else to go as all other doors are still locked! What's the deal-e-o? The code does come from the rooms that are guarded in the 27-cubicles maze, right? Any help is greatly appreciated so I can get past this. Danke!

When you get the codes entered correctly you have to go back above the 27 cubicle area that you manually set the codes in... in the area above is the 'mainframe' and you have to set all three symbols there... and then go back to the communications panel.

Now one thing that confused me is that you said they were all green... I haven't played this in awhile but you might not have entered the codes correctly. I believe there is a green one, a red one, and a blue one. Look at your datapad to see the code.

Hope that helps.