IBM Websphere 4.0启动报错,求助!

[08-6-8 10:13:05:828 CST] 688e4eac AdminServer   X WSVR0009E：启动期间发生错误
java.lang.NullPointerException
        at COM.ibm.db2.jdbc.DB2PooledConnection.close(DB2PooledConnection.java:235)
        at com.ibm.ejs.cm.portability.PortabilityLayerImpl.getInstance(PortabilityLayerImpl.java:1019)
        at com.ibm.ejs.cm.portability.PortabilityLayerFactory.getPortabilityLayer(PortabilityLayerFactory.java:64)
        at com.ibm.ejs.cm.JDBC1PhaseRF.createConnectionFactory(JDBC1PhaseRF.java:57)
        at com.ibm.ejs.cm.DataSourceImpl$3.run(DataSourceImpl.java:219)
        at java.security.AccessController.doPrivileged(Native Method)
        at com.ibm.ejs.cm.DataSourceImpl.getSource(DataSourceImpl.java:217)
        at com.ibm.ejs.cm.DataSourceImpl$1.run(DataSourceImpl.java:135)
        at java.security.AccessController.doPrivileged(Native Method)
        at com.ibm.ejs.cm.DataSourceImpl.getConnection(DataSourceImpl.java:133)
        at com.ibm.ejs.cm.DataSourceImpl.getConnection(DataSourceImpl.java:102)
        at com.ibm.ejs.sm.util.db.DBMgr.initialize(DBMgr.java:206)
        at com.ibm.ejs.sm.server.AdminServer.initializeConnectionManager(AdminServer.java:1183)
        at com.ibm.ws.runtime.Server.initializeRuntime0(Server.java:945)
        at com.ibm.ejs.sm.server.ManagedServer.initializeRuntime0(ManagedServer.java:408)
        at com.ibm.ejs.sm.server.AdminServer.initializeRuntime0(AdminServer.java:1152)
        at com.ibm.ws.runtime.Server.initializeRuntime(Server.java:884)
        at com.ibm.ejs.sm.server.AdminServer.main(AdminServer.java:401)
        at java.lang.reflect.Method.invoke(Native Method)
        at com.ibm.ws.bootstrap.WSLauncher.main(WSLauncher.java:158)

[08-6-8 10:13:05:859 CST] 688e4eac AdminServer   F WSVR0067E: 初始化 WebSphere 管理服务器失败
[08-6-8 10:13:05:859 CST] 688e4eac SystemOut     U WSVR0067E: 初始化 WebSphere 管理服务器失败

请大侠给个解决办法啊,谢谢