请教高手程序移植问题

应用程序放在Tomcat5.0 下面是好的，移植到Tomcat6.0中
启动时报
javax.naming.NamingException: Cannot create resource instance
        at org.apache.naming.factory.ResourceFactory.getObjectInstance(ResourceFactory.java:143)
        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:153)
        at com.bonc.javax.DataCenter.connect(Unknown Source:211)
        at com.bonc.javax.DataCenter.connect(Unknown Source:168)
        at com.bonc.security.util.InitServlet.init(InitServlet.java:32)
        at org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper.java:1161)
        at org.apache.catalina.core.StandardWrapper.load(StandardWrapper.java:981)
        at org.apache.catalina.core.StandardContext.loadOnStartup(StandardContext.java:4058)
        at org.apache.catalina.core.StandardContext.start(StandardContext.java:4364)
        at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:791)
        at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:771)
        at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:525)
        at org.apache.catalina.startup.HostConfig.deployDescriptor(HostConfig.java:626)
        at org.apache.catalina.startup.HostConfig.deployDescriptors(HostConfig.java:553)
        at org.apache.catalina.startup.HostConfig.deployApps(HostConfig.java:488)
        at org.apache.catalina.startup.HostConfig.start(HostConfig.java:1147)
        at org.apache.catalina.startup.HostConfig.lifecycleEvent(HostConfig.java:311)
        at org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(LifecycleSupport.java:117)
        at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1053)
        at org.apache.catalina.core.StandardHost.start(StandardHost.java:719)
        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:578)
        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:288)
        at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:413)
select const_value  from sys_const_table  where const_name='system.dbuser.ods' and const_type='var.dss'
java.lang.NullPointerException
        at com.bonc.javax.DataCenter.retrieve(Unknown Source:607)
        at com.bonc.javax.DataCenter.retrieve(Unknown Source:635)
        at com.bonc.security.util.SysParam.getParam(SysParam.java:102)
        at com.bonc.security.util.SysParam.loadDBUsers(SysParam.java:41)
        at com.bonc.security.util.InitServlet.init(InitServlet.java:35)
        at org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper.java:1161)
        at org.apache.catalina.core.StandardWrapper.load(StandardWrapper.java:981)
        at org.apache.catalina.core.StandardContext.loadOnStartup(StandardContext.java:4058)
        at org.apache.catalina.core.StandardContext.start(StandardContext.java:4364)
        at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:791)
        at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:771)
        at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:525)
        at org.apache.catalina.startup.HostConfig.deployDescriptor(HostConfig.java:626)
        at org.apache.catalina.startup.HostConfig.deployDescriptors(HostConfig.java:553)
        at org.apache.catalina.startup.HostConfig.deployApps(HostConfig.java:488)
        at org.apache.catalina.startup.HostConfig.start(HostConfig.java:1147)
        at org.apache.catalina.startup.HostConfig.lifecycleEvent(HostConfig.java:311)
        at org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(LifecycleSupport.java:117)
        at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1053)
        at org.apache.catalina.core.StandardHost.start(StandardHost.java:719)
        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:578)
        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:288)
        at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:413)
java.lang.NullPointerException
        at com.bonc.security.util.SysParam.getParam(SysParam.java:103)
        at com.bonc.security.util.SysParam.loadDBUsers(SysParam.java:41)
        at com.bonc.security.util.InitServlet.init(InitServlet.java:35)
        at org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper.java:1161)
        at org.apache.catalina.core.StandardWrapper.load(StandardWrapper.java:981)
        at org.apache.catalina.core.StandardContext.loadOnStartup(StandardContext.java:4058)
        at org.apache.catalina.core.StandardContext.start(StandardContext.java:4364)
        at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:791)
        at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:771)
        at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:525)
        at org.apache.catalina.startup.HostConfig.deployDescriptor(HostConfig.java:626)
        at org.apache.catalina.startup.HostConfig.deployDescriptors(HostConfig.java:553)
        at org.apache.catalina.startup.HostConfig.deployApps(HostConfig.java:488)
        at org.apache.catalina.startup.HostConfig.start(HostConfig.java:1147)
        at org.apache.catalina.startup.HostConfig.lifecycleEvent(HostConfig.java:311)
        at org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(LifecycleSupport.java:117)
自定义dss.xml
<?xml version='1.0' encoding='utf-8'?>
<Context docBase="D:\workspace\dss_js\dss" path="/dss" privileged="true" reloadable="true"><!--D:\BONC\dss_hq\dss-->
<Resource name="default" auth="Container" type="com.mchange.v2.c3p0.ComboPooledDataSource"/>
<ResourceParams name="default">
        <parameter>
            <name>factory</name>
            <value>org.apache.naming.factory.BeanFactory</value>
        </parameter>
        <parameter>
            <name>driverClass</name>
            <value>oracle.jdbc.driver.OracleDriver</value>
        </parameter>
        <parameter>
            <name>jdbcUrl</name>
            <value>jdbc:oracle:thin:@132.224.100.11:1521:jsbast</value>        
        </parameter>
        <parameter>
            <name>user</name>
            <value>dss</value>
        </parameter>
        <parameter>
            <name>password</name>
            <value>dss</value><!--d_s_090401-->
        </parameter>
        <parameter>
            <name>minPoolSize</name>
            <value>5</value>
        </parameter>
        <parameter>
            <name>maxPoolSize</name>
            <value>100</value>
        </parameter>
        <parameter>
            <name>acquireIncrement</name>
            <value>5</value>
        </parameter>
        <parameter>
            <name>maxIdleTime</name>
            <value>120</value>
        </parameter>
  <parameter>
            <name>preferredTestQuery</name>
            <value>select 1 from dual</value>
        </parameter>
        <parameter>
            <name>idleConnectionTestPeriod</name>
            <value>60</value>
        </parameter>
    </ResourceParams>
</Context>