Hi, I am migrating my application from tomcat 4 to tomcat 6.0. But the data sources are not being created. I have configured the datasources in the server.xml as follows: Im trying to connect to sql server 2005. server.xml serverName NYCITASD074 portNumber 1433 databaseName FBRAE_GLOBAL factory com.microsoft.jdbcx.sqlserver.SQLServerDataSourceFactory driverClassName com.microsoft.sqlserver.jdbc.SQLServerXADataSource loginTimeout 3000 selectMethod cursor driverName SQLServer2005 description SQL 2005 datasource user user-id password password factory com.microsoft.pool.PoolDataSourceFactory className com.microsoft.pool.PoolDataSource poolName 2005pool maxConnections 100 minConnections 1 checkEvery 20000 idleTimeout 50000 dsJndiName jdbc/sql_2005 description MSSQL_Pool05 I am getting the following error: PoolName = 2005pool PoolJndiRef = jdbc/global05 Init Param: jdbc/global05 javax.naming.NamingException: Cannot create resource instance at org.apache.naming.factory.ResourceFactory.getObjectInstance(ResourceFactory.java:142) at javax.naming.spi.NamingManager.getObjectInstance(NamingManager.java:304) at org.apache.naming.NamingContext.lookup(NamingContext.java:793) at org.apache.naming.NamingContext.lookup(NamingContext.java:140) at org.apache.naming.NamingContext.lookup(NamingContext.java:781) at org.apache.naming.NamingContext.lookup(NamingContext.java:153) at org.apache.naming.factory.ResourceLinkFactory.getObjectInstance(ResourceLinkFactory.java:97) at javax.naming.spi.NamingManager.getObjectInstance(NamingManager.java:304) at org.apache.naming.NamingContext.lookup(NamingContext.java:793) at org.apache.naming.NamingContext.lookup(NamingContext.java:140) at org.apache.naming.NamingContext.lookup(NamingContext.java:781) at org.apache.naming.NamingContext.lookup(NamingContext.java:153) at com.microsoft.pool.JNDITool.getPoolDataSource(JNDITool.java:103) at com.microsoft.pool.PoolHandler.createPool(PoolHandler.java:48) at com.microsoft.pool.PoolHandler.init(PoolHandler.java:75) at org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper.java:1173) at org.apache.catalina.core.StandardWrapper.load(StandardWrapper.java:993) at org.apache.catalina.core.StandardContext.loadOnStartup(StandardContext.java:4187) at org.apache.catalina.core.StandardContext.start(StandardContext.java:4496) at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1045) at org.apache.catalina.core.StandardHost.start(StandardHost.java:722) at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1045) at org.apache.catalina.core.StandardEngine.start(StandardEngine.java:443) at org.apache.catalina.core.StandardService.start(StandardService.java:516) at org.apache.catalina.core.StandardServer.start(StandardServer.java:710) at org.apache.catalina.startup.Catalina.start(Catalina.java:593) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) at java.lang.reflect.Method.invoke(Method.java:597) at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:289) at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:414) java.lang.NullPointerException at com.microsoft.pool.JNDITool.getPoolDataSource(JNDITool.java:123) at com.microsoft.pool.PoolHandler.createPool(PoolHandler.java:48) at com.microsoft.pool.PoolHandler.init(PoolHandler.java:75) at org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper.java:1173) at org.apache.catalina.core.StandardWrapper.load(StandardWrapper.java:993) at org.apache.catalina.core.StandardContext.loadOnStartup(StandardContext.java:4187) at org.apache.catalina.core.StandardContext.start(StandardContext.java:4496) at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1045) at org.apache.catalina.core.StandardHost.start(StandardHost.java:722) at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1045) at org.apache.catalina.core.StandardEngine.start(StandardEngine.java:443) at org.apache.catalina.core.StandardService.start(StandardService.java:516) at org.apache.catalina.core.StandardServer.start(StandardServer.java:710) at org.apache.catalina.startup.Catalina.start(Catalina.java:593) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) at java.lang.reflect.Method.invoke(Method.java:597) at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:289) at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:414) Please advise as to what could be wrong since im using the server.xml that i was using with the tomcat 4. 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