Replying to Need some help wih rails

I'm having trouble with certain rails/boxes, specifically: 1. Flat Downs 2. C's that spin the way I'm not used to On flat downs, a little after I hit the down part, my feet slide out from under me, and I fall. Obviously, the problem is simple, lean farther downhill. Problem is, I'm not used to having to lean so far downhill, anyone have tips? On the C's. I'm not sure what my problem is. I spin to my left, so I slide rails/boxes with my right leg/foot forward. I'm used to C's where I hop on 90 degrees, and my tips are higher/on the outside, and my tails are lower/inside. So I'm having trouble with C's that curve the other way (opposite of the way the real letter C looks), like when my tips are lower/inside. Hopefully that makes a little sense. Thanks to anyone who can help.