Please HELP ME!!!!!!!!!

i want that me server (Java application server) work with Mysql. I create Connection pool and select there Datasource Classname:

org.gjt.mm.mysql.jdbc2.optional.MysqlDataSource

but when i ping i have this exception:

Operation 'pingConnectionPool' failed in 'resources' Config Mbean. Target exception message: Class name is wrong or classpath is not set for : org.gjt.mm.mysql.jdbc2.optional.MysqlDataSource

please say me what i can do that this exception will be removed!

senks

[518 byte] By [Trollchika] at [2007-11-27 5:20:18]