Basics of Chroma Keying in Flash

OK. I just spent good money on a green screen and can’t get it working properly in Flash 8. I took a picture in front of the green screen then put that into Vegas movie studio 6. There I added the chroma key effect. The chroma key works fine there. Next I render the movie in quick time 6 format and bring it into the flash video encoder. I set it to encode the movie’s alpha channel. I finally bring the movie into flash as an embeded SWF and all i see is a transparent white surface. What am I doining wrong.:puzzled: