You can not administer a 10.4 (Tiger) server with the Admin Tools that ship with 10.5 (Leopard) server. This is really annoying (and not the way it has worked in the past).
Only solution, use screen sharing or ARD from your Leopard desktop to run Server Admin on an Tiger machine. Well, I suppose upgrading the server from 10.4 to 10.5 is another option but for some machines I’m not rushing down that path…and it may well be possible to run two versions of the server admin tools on the same client machine (but I don’t want to do that if I don’t have to).
I am upgrading one server so we can test whether or not it’s true that Leopard server adds LDAP support to QuickTime Streaming Server. Will report back in a week or so.