I don't have any specific advice for you, but wanted to let you know that you're not alone. It took me "forever" to get it. I just kept trying it and one day it clicked -- I was so happy! And even knowing that I can do it, doesn't always guarantee success with it on any particular day. Some days it's there, some days it's not.
Have you tried watching it in slow motion? Also, I know on any move like that, I have to keep my core very tight and be very light on my feet.