1- There is tomcat 5.5.23 2- when I make 'locate naming-factory-dbcp.jar' I have one match in tomcat/common/lib
3- The file have root permission, I change it for tomcat, but there are no change 4- And it's the first error in the logs file. I noticed this: When I start the server I have this message: Apr 26, 2007 2:35:59 PM org.apache.catalina.core.NamingContextListeneraddResource WARNING: Failed to register in JMX: javax.naming.NamingException: Could not create resource factory instance [Root exception is java.lang.ClassNotFoundException: org.apache.tomcat.dbcp.dbcp.BasicDataSourceFactory] Maybe this can help you, Thanks for your help Aurélien Allienne