You have to make sure you allow remote desktop from your home PC. If you go into remote settings, select Allow Remote Desktop from any version of the client. You may get a warning, but it's okay. I believe that adds a rule in the windows firewall, but you might want to disable the firewall on your home PC if the above doesn't work. So, first allow remote desktop (off by default), if that doesn't work, try disabling the firewall, but it would be nice if you could get things to work without disabling the firewall, or add a rule to the firewall to allow RDP.