ipc-hfw2320r-zs-ire6

I just bought one of these http://www.dahuasecurity.com/products/ipc-hfw2320r-zsvfs-ire6-1402.html This model has the motorized verifocal lens. However, I am unable to get the optical zoom to function in BI. I can only get the image to show by using main stream rtsp. The profile for...