Hey Juan, could you try the sample from Showcase?

http://showcase.richfaces.org/richfaces/component-sample.jsf?demo=notify&sample=stackingMessages&skin=blueSky

This message is automatically generated by JIRA.
If you think it was sent incorrectly, please contact your JIRA administrators.
For more information on JIRA, see: http://www.atlassian.com/software/jira