Capsule Collider Moving Through Terrain

I have a Capsule Collider attached to my Character Model. I'm having the model move pretty quickly and when it collides with the side of a vertical slope on the terrain, the model pushes through pretty easily. I've tried increasing Terrain T$$anonymous$$ckness, that doesn't work. I've tried increasing the Collider Radius, that doesn't work. I've tried Continuous Dynamic, doesn't work. What am I missing? Any help would be great, thanks!