How to fix a hamachi VPN error between computers with windows 7 and 8?

My brother has windows 8 and I have windows 7. We try to play minecraft on a Hamachi server and we can't get it to work. Is there a way to fix the VPN error he is getting when he tries to connect to me?

Me and my friend had this issue. 1st of if you're using pirated version of minecraft, make sure its the exactly same version. And then delete hamachi and install (make sure you delete the profile when you uninstall it) and reintall it, and before you run it run it in compatibility mode (Windows xp Service pack 3) then it should work!