I have 2 servers with the identical setup. One is the master and one is the slave. From the control panel on my master server, I added a secondary DNS zone on my slave server. It does not show up on my slave server. Is it because I installed the ISPCONFIG CONTROL PANEL on my slave as well? That's the only difference between my slave install and those that they show in the guides. My slave server is on the allowed transfer and notify on the primary zone.