Recently I've been trying to land a bs 180 on a 10' jump at my hill and I keep sketching out on the takeoff and not getting any rotation.

The lip on the jump is really sharp and its hard to get a rotation going on it.
I've been riding for about 5 or 6 years now but mostly free riding and I've just started getting into freestyle this year. I'm 5'8" 135 pounds and ride regular. My 180 are on lock on side hits and rollers but I just can't get them on this jump.
Any help given is appreciated thanks for reading my post.