Calling all figure skaters! How can I get the backspin position in the air in jumps?

I'm having a lot of trouble with my loop and flip. No matter what, on the ice I can't get my feet to cross in the air (in the backspin position). Off the ice I can do it fine- I've even videotaped myself, and people have said that I have the correct position off ice. What could be the problem? Please help, I want to fix this up so that I can move into Freestyle 5!!!!