Can you elaborate on your OS/vpn client? Did you perform client steps as per instructions? http://forum.mikrotik.com/t/ipsec-ike2-with-certificates-vpn-server-guide-for-remote-access/149434/1 
Maybe someone could comment on ROS part - I do have a feeling that it has something to do with either misconfigured policies or misconfigured mode-config in ROS ip->ipsec settings.