I have recently upgraded all 3 of our ZEN server from 10.3.3 to 10.3.4 and our two secondary server are working ok but the primary server we use for our imaging is not wanting to let any computer PXE boot to it. The error message I receive is exiting Bootcome PXE and then just boot the computer as normal. If I use an old ZCM CD of 10.3.3 I can get to the imaging window but then if I try to use the primary imaging server I get the error message Unable to connect to Preboot server. The Product license might have expired. If I use the CD and get to the imaging windows I can put in one of our secondary ZEN server with the exact same setup as the primary and I am able to image from them. I do not have PXE/PROXYDHCP setup on the secondary server.