Posted 02 November 2012 - 19:32
If they're virtual machines, how do you have the virtual network cards configured? Are they handing out private IPs between the host OS and the guests, or are they allowed to connect directly to your LAN? That could prevent computers other than the one they're hosted on from being able to connect via Remote Desktop.
What virtual machine software are you using? (VMWare, VirtualBox, etc.)
What specifically does the error say?
Can you ping the virtual machines from the one you're attempting to connect from? If not, take another look at the configuration of the virtual network interfaces in your VM software.