Mysql JDBC/ODBC connection error(s)

Hi i know this is a common issue that it saves putting the 'mysql-connector-java-5.1.25-bin.jar' driver into 'C:\Archivos de programa\pentaho\design-tools\data-integration\libext\JDBC'.
But in my case this doesn't solves it. I tried so many variants, put it on 'libext', 'lib'... always the error message was:

Exception while loading class
org.gjt.mm.mysql.Driver

I think this error became of missing path or something...

I tried too to make a new database connection vía ODBC, and this way was succesfull. And then I tried to make a Catalog connection via ODBC, but new error message appears:
Error connecting to database: (using class sun.jdbc.odbc.JdbcOdbcDriver)
[Microsoft][Administrador de controladores ODBC] The name of the data source is too long

I'm using Kettle SpoonStable release 4.4.0 on windows XP, my dsn odbc name is 'pordsn'. Mysql version is 5.1.41.
Environment: CLASSPATH=.;C:\Archivos de programa\Java\jdk1.7.0_05;C:\Archivos de programa\pentaho\design-tools\data-integration\libext\JDBC
JAVA_HOME=C:\Archivos de programa\Java\jdk1.7.0_05
PENTAHO_HOME=C:\Archivos de programa\pentaho
PENTAHO_INSTALLED_LICENSE_PATH=C:\Archivos de programa\pentaho\.installedLicenses.xml
PENTAHO_JAVA_HOME=C:\Archivos de programa\Java\jdk1.7.0_05

Thanks for help
Eduardo