MaxDB operators and users cannot login

Hi,

I changed the password of the user SUPERDBA in MaxDB and after doing so, I was prompted to enter the new password when I tried to change another user's password, however, after entering the new password of SUPERDBA, I was prompted that User login failed. And I tried logging on aain using the old password of SUPERDBA, but still I was not able to logon. I tried using other users to logon but I get the same error message "-2 ERR_USRFAIL: User authentication failed". Is there a way to logon to MaxDB using a default user and password since I am not able to access MaxDB now in DBMGUI and our liveCache database is not connected. It's a total lock out since I am not allowed to login using any user.

Thank you.