I've got an aftermarket stereo installed with the Crux adaptor in my e39. The steering wheel controls for volume and track changes work fine, but the Phone and R/T buttons don't do anything. Has anyone successfully gotten those buttons to be useful in controlling an aftermarket stereo?

Have others had luck with a system that lets you pass those buttons to the stereo functions? In the past, I've used the Axxess ASWC-1 for this purpose, and the buttons could be mapped to specific functions, long presses could be mapped to different functions, etc. Has anyone used that adaptor here? The Crux doesn't appear to support mapping.

I can't tell if these buttons are not working because they are not really hooked up to anything without the BMW car phone accessory, or if they just aren't being mapped by the Crux.

Thanks for any advice!
-Neil