Here is an old AAX error that was never fixed that is still showing up in Pro Tools 11 with the latest Vienna Ensemble Pro 5 Server version 5.1.12331.
If I create a 5.1 Aux in Pro Tools and instance the VEPro 5.1 insert, then the channel configuration in the Server interface always comes up as Stereo. If I try to connect to the server then Pro Tools will crash.
This was a problem under the old AAX 5.1, so I worked around it with the RTAS 5.1. Now I can't do that in Pro Tools 11.
Is there any way to fix it? Here is an screen grab showing the problem. I can't make Channel Configuration read 5.1.
http://www.johnmdavis.com/wp-content/JDMP3/misc/VEPerror.tiff