winbox access through VPN

hey all

this is maybe a little more then beginner basics, so MOD feel free to move my post to appropriate place…

I have an MK (routerOS) at my home and a MK hap ac2 at my moms place

I have made a SSTP client for the hap ac2 and a connection is being established but I can´t login to winbox with the IP of the client (vpn IP of hap ac2)

goal for the day: get access to winbox

goal for the year: my moms computer can access the her LAN and the internet, my labtop can´t tell the difference if I´m at home or at her place.

Maybe it helps you: http://forum.mikrotik.com/t/cant-access-web-ui-with-vpn/119068/6