I Can't startup Pentaho Server 5.0.1 ce when I Change admin username (Using Default Jackrabbit Repository) :

The Message Below Appear :

Grave: The web application [/pentaho] registered the JDBC driver [org.h2.Driver] but failed to unregister it when the web application was stopped. To prevent a memory leak, the JDBC Driver has been forcibly unregistered.
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java.lang.RuntimeException: org.springframework.security.userdetails.UsernameNotFoundException: User not found; nested exception is org.springframework.security.userdetails.UsernameNotFoundException: User not found.

pentaho-biserver-ce-5.0.1-stable
java 1.7.0_51 (OpenJDK)
CentOS 6 (x86_64)


Any Suggestions