I'm trying to connect to a computer running ubuntu 12.04 from a windows XP computer using mstsc. I've already installed xrdp through sudo apt-get install xrdp, but I can't establish a connection with the 12.04 computers at all.

On the other hand, there is a 10.04 computer with which I am able to establish a connection through xrdp, but using either the OK button to try to log in or the Cancel button results in a protocol error, reading

"Because of a protocol error, this session will be disconnected. Please try connecting to the remote computer again"

yielding the same result every time. I also installed x11rdp on the 10.04, but trying to log in through the x11rdp module results in the same error. Any insights are appreciated!