Replying to How do I slide rails like Wabs and most ski grabbers here?

hey hey hey, I just started skiing last year but got super into it and started skiing park this year. I can slide most boxes in my park. But whenever I try to bring it to rails I slip back and kill myself. The obvious answer is to lean forward more but I am never in control enough to find myself pushing either one of my legs down on the rail. I can slide corrugated tubes well tho. Pls help