I got this error when I updated to postgres 7.4 but forgot to add the NEW driver jar file to the jboss classpath and remove the old one.
I am having the same problem getting postgres driver(pg74.214.jdbc3.jar) working with jboss.
I get an error in deploying my application. It says...
"Throwable... Could not create connection"
I am using jboss3.2.3 and postgres7.4
My JBOSS_HOME is /usr/share/jboss
I am able to log into psql using the same user/pass mentioned in postgres-ds.xml and connect to the right DB.
I am using a Gentoo Ditribution and all packages are up to date.
If you could tell me exactly where you copied the pg74.214.jdbc3.jar file, and the postgres-ds.xml file, that would help...
Thanks in advance