Remote desktop everything is dimmed
I have a lab with several different macs. I'm using ARD 3 and have access to about 3 of my computers. The rest of them I can see and control, but everything else is dimmed. I can't do anything else remotely. What do I do. I've tried upgrading the client software and I've tried taking them out of my list and re entering them. Nothing is working. Where do I go from here?
Apple Remote Desktop-OTHER, Mac OS X (10.6.8)