Chris
ProRes 422 (LT)
RGB
Millions of Colors
Premultiplied (Matted)
As Paul has said, You are not rendering the footage with Alpha Channel.
RGB
Millions of Colors Implies that there is no Alpha channel.
The Output Module Settings should look like this:
Vishesh Arora
3D and Motion Graphics Artist
Films Rajendra
Blog:
http://digieffects.wordpress.com
2011 3D Demo Reel: