Juce v1.46 Rtas not working with channel configs

I compiled the Juce Demo and set max channels to 4 and the channel config to {4, 2} but it doesn’t show up in Pro Tools. If I want an external sidechain input what settings should I use to get this?

PT 8.0, juce 1.46, gcc 4, xcode 3.1, os 10.5.6

Andrew Simper