I am not using any VMs, I have just been using the "UOXL NEW" tab in EUO to open a new client. As Cerv mentioned, it just started popping up a menu that says "multi client is unsupported," the that has not made a difference in the problem I have had.
I guess there are actually two problems. On the machine I can use multi client on, it locks up if I go over four. that may be just the CPU getting overwhelmed.
Problem Two: on two other machines, I simply can open another client using the UOXL New tab, but that second client can't connect to the OSI server. I was wondering whether anyone had some insight into this problem.