arnold 5 aiSwitch issue

#1

i am working on a short where a single character is used multiple times with different texture. I’m using Arnold 5/maya 2016. I planned to use aiSwitch for the multiple texture on the same rig, but its not working. On arnold/maya help page, there is absolutely nothing regarding aiSwitch shader. I searched for tutes and other help but no success so far. All the other attributes of the aistandard surface are working absolutely fine except the color/texture.