how to fix knees bending instead of feet with locomotion system?

so i am using that wonderful locomotion system with a character which is rigged well and fully animated but im having an issue with uneven terrain, the knees seem to bend in very odd directions, to describe it the best i can is that they are perpendicular with the ground while there is no bend in the ankles at all, i have set everything accordingly with the docs, and have experimented with trying different bones to no avail any ideas would be greatly appreciated