NetBeans and MySQL-JDBC-Driver

[Konrad Piersdorfer]

i run a jsp over the internal instance of tomcat of netbeans and i try
to connect to my db.
i get a ClassNotFoundException in Class.forName("org.gjt.mm.mysql.Driver")

i have installed the jdbc-driver in the following directories:
tomcat406/common/lib/
tomcat406/lib/
<myWebapplication>/WEB-INF/lib/
tomcat406_base/webapps/manager/WEB-INF/lib/
tomcat406_base/webapps/webdav/WEB-INF/lib/

i don´t know, where else i should install the driver.
please help!