Final Cut Pro "Chroma Key" help.

[alebeau]

Hello there...this is André... For the last two days, I've been interested in learning how to Chroma Key. I have FCP and I've gone over a couple of tutorials on how to Chroma key. On google, i got a photo of a lady in a green background and the chroma key cam out just fine. However, i took a picture myself (behind a plain blue certain) and the picture came out fine. When it came time to Chroma Key, every time I adjusted the settings, part of me went away with the background. I'd really like to learn how to Chroma Key. Here is the picture i am trying to use if you can be of any help: http://i410.photobucket.com/albums/pp187/alebeau4106/Photo17.jpg

If this picture is just bad, and it cannot be used to Chroma Key, please let me know. If I just need to work on my skills, tell me hot to do so as would really like to learn how to do this well.

Thanks so much!

--André