Standing Tall

Being an ex-skier, getting lift off the wake has been my biggest challenge. I feel that I have the progessive edge down fairly well, but I am having problems with the concept of standing tall at the wake. I feel that if I try to stand tall off the wake, I end up flattening out the board and ramp through the wake. When exactly do you stand tall and how do you do it without flattening the board? Also, on alot of my jumps, the front of the board is much higher than the rear. Any suggestions would be appreciated

Thanks, Rich