How to set off background color reflection? I'm very new to blender. I animated this model:



I want to use this animation in a video. I use chroma key to take away the background but it's impossible to do this when the green color from the background reflects on the door(see image). I did change the Environment and Indirect lighting but it did'nt help. I tried many things but nothing worked. Can someone help me out? 

EDIT
I'm in blender render mode.
You Don't have to use chroma,You can just render the video in alpha channel.

Cycles:



To do so,You just have to check transparent  film panel:


This will render the background as Alpha but the reflections will be still here.

To remove the colored reflection,Uncheck use Environment in render layer:



Blender Internal:



You just have to Uncheck Sky in render layers: