testing a example,the env is: db: sql server 2000 os:windows 2003 jboss as:jboss-4.2.2.GA deploy the project and start jboss as, show the error info: 2007-12-18 17:51:17,843 WARN [org.jboss.resource.connectionmanager.JBossManagedConnectionPool] Throwable while attempting to get a new connection: null | org.jboss.resource.JBossResourceException: Could not create connection; - nested throwable: (org.jboss.resource.JBossResourceException: Failed to register driver for: com.microsoft.sqlserver.jdbc.SQLServerDriver; - nested throwable: (java.lang.ClassNotFoundException: No ClassLoaders found for: com.microsoft.sqlserver.jdbc.SQLServerDriver)) i have copy the sql server jdbc driver to $JBOSS_HOME/server/default/deploy/lib directory how to solve it View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4114047#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...