I often get the message "Remote Machine Unavailable, the remote machine you are trying to connect to is offline and unavailable". I say 'often' as in about 75 percent of the time. Makes no difference if I'm in the area of the computer or not, by wifi or not. (I'm using a mac). I don't do anything different to connect or anything different when I can't connect. I can restart the computer and it doesn't seem to affect it one way or the other. Please help. This is a great tool (when it works) and I need it often.