hello, I have been working on my swing over the winter trying to get better and have come across one problem that i can't seem to fix. On the downswing i come down too steep. I am trying to flatten out the downswing so it looks just like my practice swing. As you can see from the video below on my practice swing the club comes nicely from the inside but on the real swing i come down a little steep. I have tried everything i can think of to fix it but nothing works. Any help is appreciated thanks.

http://www.youtube.com/watch?v=uJPNyp-YRuA