GlassFish not loading connector

问题

I'm using GlassFish 3 and I can't seem to get it to recognize the MySql connector. The admin console always says:

Ping Connection Pool for --- is Failed. Ping failed Exception - Class name is wrong or classpath is not set for : com.mysql.jdbc.jdbc2.optional.MysqlDataSource Please check the server.log for more details.

However, JPA can connect even with the error. The only downside is that I get resize pool exceptions (null). I've even placed the connector in the following folders:

%GLASSFISH%/lib
%GLASSFISH%/domains/domain1/lib
%GLASSFISH%/domains/domain1/lib/ext

I also tried the solution at http://old.nabble.com/MySql-connector-problems,-Class-name-is-wrong-or-classpath-td21833176.html however setting class path is (unsupported in V3).

Any ideas? :(

EDIT:

Nvm... I fixed it by dropping the connector in