tomcat http error 500

[oll3i]

i get http error 500 when trying to connect to mysql database
i use tomcat 5.5 ,connector mysql-connector-java-5.1.6-bin.jar and i get the following error
java.sql.SQLExc eption: Access denied for user ''@'localhost' (using password: NO)

Thank You

[r035198x]

Are you using the right user name and password to connect?
Are you able to connect with that user name/password from a command promt?