1) did you restart appserver after copying the jar to "glassfish\domains\domain1\lib\ext\" ?
2) does your jdbc driver has the class "com.mysql.jdbc.jdbc2.optional.MysqlDataSource" [the jar file you have indicated is supposed to have this class]
(jar -tvf "mysql-driver.jar" | grep com.mysql.jdbc.jdbc2.optional.MysqlDataSource)
If your problem is still not solved, please post the exception messages from server.log
Thanks,
-Jagadish
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