Ok, this error is because JBoss just takes care of jbosscmp-jdbc ans does not take care of ejb-jar.xml.
So, is it possible to use ejb-jar.xml, defining all that I need for my beans (cmps, cmrs, relationship, finder with EJBQL queries, etc.) AND JBOSSCMP-JDBC AT THE SAME TIME
(just to define finders that need jbossql) ?
HELP ME PLEASE :)