Indeed, thanks for help Gregg.
But what is really annoying to me:
1. Lack of good documentations.
In resources.groovy, jmsConnectionFactory should be defined but the
http://www.grails.org/JMS+Plugin defined connectionFactory which isn't working.
2. Grails is about 70% available.
So slow to run, slow to run tests, slow to get plugins list.
Rails and Django really beat Grails hard in this aspect.
Any way, thanks for help and time.