I used the RD connection client flawlessly in the Lion OS but when I upgraded to Mountain Lion it failed to work anymore. I am getting a "The Mac cannot connect to the windows based computer" error message. This happens about 95% of the time. The other 5% I am able to connect and I can see my remote PC but only for a second before I get disconnected. I have the latest version of Remote Desktop for Mac (2.1.1 (110309)). Any ideas? Anyone else having this problem?