Logon using J2EE Engine Visual Administrator

Good Morning,

i need to login to my J2EE Engine Visual Administrator but when i'm trying to do so user sap* is active and i can't logon with other users than that.

How can i change this in order to be able to logon with other users (for example user Administrator and adsuser).

I also need to create new passwords for the users Administrator and adsuser, how can i do that without being able to login to Netweaver Administration?

Thanks.

Regards,

Pedro Gaspar