Multicast Session not starting all clients

Hello,

I am currently testing Ghost Solution Suite 2.5.1 on a windows server 2008 r2 with 40 clients, everything connected directly to one isolated cisco switch.

I got multicasting up and running, but still encounter a small problem: most of the times when I start a multicast task only 32 clients connect. And it is always exactly 32. After cancelling and restarting the task two or three times finally the rest of the clients connect, too and the multicast works quite good.

Do you have any information regarding such a behaviour or any idea where this problem could come from?

Thank you very much.