I am using a Netware 6.5 SP2 and Zen 6.5 with Update 2 applied, as well as
img4 update.

I am having trouble using Multicast in Maintenance mode. (by pressing CTRL-
ALT during boot) These are new machines and don't have Zen agent on them,
otherwise they would have been imported and I could have added them to the
Participation list.

I've tried setting criteria by MAC address, I tried changing the
time "since new client has joined" and none of that has worked. I've also
tried to delete the multicast session and create a new one with no luck.

The machines just say "Waiting for master to start".