anonymous wrote : Could not create connection; - nested throwable: (java.sql.SQLException: Exceção de E/S: Connection refused(DESCRIPTION=(TMP=)(VSNNUM=153094144)(ERR=12505)(ERROR_STACK=(ERROR=(CODE=12505)(EMFI=4))))) Are you sure the connection-url you have mentioned in the ds.xml file is correct? Especially the database name? <connection-url>jdbc:oracle:thin:@xx.x.x.xx:1521:Gd13</connection-url> Googling for this error code leads to some posts which mention that this error might be because of an incorrect DB name in the connection url View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4114088#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...