Replying to Need help with lincolns

Hi guys. I have a problem. Im starting to learn lincolns and i tried my first one off of this really small jump and landed on my side. it wasn't bad at all for a first try. but now i do it everytime.now i am trying them out of this like 4 foot tall halfpipe with like no lip. the same thing is happening. my friend says whenever i do them my skis go crossed when im inverted and i just kind of stop the rotation. Should i use a different jump or what. And also I spin left and i throw my left shoulder down. this i right. right? thanks to everyone. +karma