[ovirt-users] Adding network to VM - What stupid thing have I missed?

When creating a new VM, it looks like I connect it's nic(s) under the "Instantiate VM network interfaces by picking a vNIC profile." setting. The problem I am seeing is that the drop down only has "Empty" and "br-kvm-prod" (my production bridge). I should have two more. Under Networks and vNIC Profiles tabs, I also have a br-kvm-stor and kvm_heart-22 defined which don't appear in that list. Am I missing something I need to do for these additional profiles to also appear in the drop-down? Some of my VMs will need access to the other physical networks.