i dont know exactly what your reasons are for not getting more air, but here's a couple of things i did to get more air.
stand taller at the wake, really push with your legs and wait for the tip of the wake
dont cut out too far before edging in
dont put your butt out when edging, try leaning more back
keep your handle in and at your waist the whole time
if you can show us a video, i could help you better =)
(Message edited by criswb on July 20, 2007)