I have an application that has been getting the following in the Error:

org.jboss.util.NestedSQLException: Apparently wrong driver class specified for URL: class: oracle.jdbc.driver.OracleDriver, url: jdbc:oracle:thin:@203.163.38.173:1521:dbname; - nested throwable: (javax.resource.ResourceException: Apparently wrong driver class specified for URL: class: oracle.jdbc.driver.OracleDriver, url: jdbc:oracle:thin:@203.163.38.173:1521:dbname)

my jboss version is 3.0.3 include tomcat 4.1.12,I've tried to copy any one of classess111.jar,classes12.jar,classess111.zip,classes12.zip to my lib directory,but unuseful.Any idea what is causing this and how I can fix it?Thanks a lot.