Sorry bad English. Put driver jaybird-2.1.1.jar in directory .\server\default\lib\. Put portal-firebird-ds.xml in server\default\deploy\. <datasources> | <local-tx-datasource> | <jndi-name>PortalDS</jndi-name> | <connection-url>jdbc:firebirdsql:localhost:d:\\test.fdb</connection-url> | <driver-class>org.firebirdsql.jdbc.FBDriver</driver-class> | <user-name>sysdba</user-name> | <password>masterkey</password> | </local-tx-datasource> | </datasources> | Modifide jboss-portal.sar/conf/hibernate/[module]/hibernate.cfg.xml <!-- | <property name="dialect">org.hibernate.dialect.PostgreSQLDialect</property> | --> to <property name="dialect">org.hibernate.dialect.FirebirdDialect</property> JBossPortal error: Hibernate Dialect must be explicitly set for database: Firebird 1.55WI-V1.5.3.4870 Firebird 1.5/tcp | View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4091465#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...