[Zope] Problems with authentication over multiplle zeo client

Hi all, here is my propblem may someone knows a way to solve it. I am creating a website which is served by two zeo client. I am using exuserfolder for authentification (users are stored in a intebase database) This does not support authentication over the two zeo client but I want to login at zeo client1 and then change to zeo client2 whithout login again. (persistance over zeo clients) This is needed when using a loadbalancer. On zope.org this problem is solved but how? Could this problem be solved in conjunction with Core Session Tracking? And if how? Thanks in advance Jens Grewen