I've installed Pentaho 5.1 community edition with mySql on my Ubuntu 14.04 (64 bit) following this tutoral: 
<http://anonymousbi.wordpress.com/2013/12/15/pentaho-bi-server-5-0-1ce-mysql-installation-guide>
(being carefull from the step five and not erasing the class attributes from some tags).
I can access the login page but I am not able to login. I've tried all known possible cases: admin, Admin, Suzy and suzy (for the user) and "password" for the password, but it's not working. I always get the error message: "A login error occurred. Please try again."

Can someone help me? I have no idea what to do :/