To make to realms on same server with same logon you need 5 seperate DBs.
1. Logon DB (Universal)
2. World DB (Realm 1)
3. Char DB (Realm 1)
4. World DB (Realm 2)
5. Char DB (Realm 2)

Once yo have that then you must have 2 different server emulators or applications in seperate folders.



One you run Logon and world the other just world and make sure 2 is configed of realm 2 and 1 is for 1 then it should work.