I can not get this to work with ZOO, works on one site not on the other. The only thing I have been able to tell is the site it works on is Yootheme template. The sites it doesn't work with Zoo on, Rocket Theme templates. I am a big fan of Rocket Theme, very much so. But his has been an ongoing issue and has yet to be resolved on their support forum. Appears to be a very common problem with Zoo and RAS. It's a shame because I love this plugin, it just is too picky with ZOO for me to trust and ZOO is important to almost every site I build. Recommend this highly unless you are using ZOO.