I have gone back and re-installed the Application Server and ensured I declared only one datasource for our projects. Now I can not get a connection. | 00:38:27,677 INFO [WrapperDataSourceService] Bound ConnectionManager 'jboss.jca:service=DataSourceBinding,name=jdbc/pidbdev' to JNDI name 'java:jdbc/pidbdev' | 00:38:27,724 WARN [JBossManagedConnectionPool] Throwable while attempting to get a new connection: null | org.jboss.resource.JBossResourceException: Could not create connection; - nested throwable: (java.lang.ClassCastException: com.microsoft.jdbc.sqlserver.SQLServerDriver) | The XML files remained the same. The previous install did not extablish a default database. SQL Server really the secondary DB. I am hoping someone will throw me a bone here..... View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=3987043#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...