"jaikiran" wrote : What does your datasource file look like? And also which jars did you copy to the server/< serverName>/lib folder? | My postgres-ds.xml looks: | <?xml version="1.0" encoding="UTF-8"?> | | <!-- Datasource config for Postgres --> | | <datasources> | <local-tx-datasource> | <jndi-name>DefaultDS</jndi-name> | <connection-url>jdbc:postgresql://[servername]:[port]/[database name]</connection-url> | <driver-class>org.postgresql.Driver</driver-class> | <user-name>jboss</user-name> | <password>jboss</password> | <!-- sql to call when connection is created. Can be anything, select 1 is valid for PostgreSQL | <new-connection-sql>select 1</new-connection-sql> | --> | | <!-- sql to call on an existing pooled connection when it is obtained from pool. Can be anything, select 1 is valid for PostgreSQL | <check-valid-connection-sql>select 1</check-valid-connection-sql> | --> | | <!-- corresponding type-mapping in the standardjbosscmp-jdbc.xml --> | <metadata> | <type-mapping>PostgreSQL 8.0</type-mapping> | </metadata> | </local-tx-datasource> | | </datasources> | I copied postgresql-8.1-412.jdbc3.jar into lib directory (I'm using PostgreSQL 8.1.11 on Solaris10) A DB connection with psql client works fine View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4160866#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...