Help with Mikrotik VPN PPTP Setup

Hi,guys.

Please help me to set up VPN between 3 mikrotik routers.

I have 3 mikrotik routers A,B,C. I set up PPTP on router A its ok works great, then i link router A and B through PPTP VPN its work very good,

now i wanna set up a link between router B and C, the link is set,but all traffic goes through gate B not C.

Please help me.

if someone didn't understand please tell me ill try to explain.

Kind regards papanireal!