I assume you've entered wrong port for realm 1 or 2 while you was managing you realm in fusioncms dashboard. as you know ra and soap uses ports to connect to the console (in case you're not using queries type). characters are loading from database directly, but when you send an item, it sends a command to the console with that port. so it has nothing to do with console's username/password.
tldr; check your worldserver.exe ports and confirm you've correct settings in realms manager section.