VRay and Combustion

We are doing an interior scene that has glass railing with furniture on the other side of it. The Main .RPF pass has the railing with the vray glass material… the second layer .RPF has the furniture. When we composite it together using Combustion… we can not see the furniture through the glass railing. We have even checked affect alpha on the glass material and tried the transparency check in the .RPF settings.

Is this a known issue with VRay and Combustion? Any work-arounds?

does anything have matte properties assigned to it?