I installed hamachi and hamachi-gui on my girlfriend's pc and on my girlfriend's netbook. After 5 minutes or so (even if I keep using it during that time) it loses the connection, I mean I have to 'go offline' and then 'go online' again for it to see my ip again. If I don't and I ping my IP, it says 'Host unreachable'. If I connect with my Mac from the office the problem doesn't exist, so I wouldn't say it is a problem of my hamachi (server) installation, I'm tempted to say it is a problem of my girlfriend's connection, since it happens from her home, and we haven't tried yet to connect from another home with her setup. What would you say? I followed these instructions http://ubuntuforums.org/showthread.php?t=135036