Using Winbox to pppt MT client

I have a lot of MT home AP with private IPs. Id like to manage this APs so Ive made pptp connections for every home AP with my own GW. I can login in APs via telnet from my gw, but Id like to use my winbox. There is a problem the main gw "doesnt route" packets to pptp clients, I can ping AP only from main gw, not from my notebook. I`d like to use winbox from my LAN or from outside via VPN (pptp too).
Is there a way to use Winbox or pptp clients are “non-routable”?