How to resolve : Authentication denied: Boot identity not valid

Authentication denied: Boot identity not valid

11-May-2010 20:00:57 o’clock CEST> <Critical> <Security> <BEA-090402> <Authentication denied: Boot identity not valid; 

The user name and/or password from the boot identity file (boot.properties) is not valid. 

The boot identity may have been changed since the boot identity file was created. 

Please edit and update the boot identity file with the proper values of username and password. The first time the updated boot identity file is used to start the server, these new values are encrypted.>

The above mentioned error occurs generally during server startups:

Follow the following steps to resolve the issue:

Follow the following steps:

1: remove the boot.properties file completely from the managed server directory.

2: remove the ManagedServerDir/data/ldap directory completely.

3: Always keep backup of files before removing it.

4: Now try to start the server from the command prompt and provide the username/password used to login to the Admin Console.

If the above mentioned steps does not resolves the issue then please post your issue here I can try look into it.