made a Session Bean. In this session bean i used CachedRowSet to return some data from database.
I succeeded deploying it to jboss 3.2.1. But when i used my client to call the session bean,the jboss gave a ClassNotFoundException. it told me class sun.jdbc.rowset.CachedRowSet is not found. I have already copied rowset.jar to server/all/lib/. How can I resolve this problem. Thanks a lot.

there are Exception message

java.lang.NoClassDefFoundError: sun/jdbc/rowset/CachedRowSet
at com.Intelliprise.Test2.EJB.GetDataBean.doGetData(GetDataBean.java:49)
at java.lang.reflect.Method.invoke(Native Method)
at org.jboss.ejb.StatelessSessionContainer$ContainerInterceptor.invoke(StatelessSessionConta
iner.java:629)
at org.jboss.resource.connectionmanager.CachedConnectionInterceptor.invoke(CachedConnectionI
nterceptor.java:186)
at org.jboss.ejb.plugins.StatelessSessionInstanceInterceptor.invoke(StatelessSessionInstance
Interceptor.java:72)
at org.jboss.ejb.plugins.AbstractTxInterceptor.invokeNext(AbstractTxInterceptor.java:84)
at org.jboss.ejb.plugins.TxInterceptorCMT.runWithTransactions(TxInterceptorCMT.java:243)
at org.jboss.ejb.plugins.TxInterceptorCMT.invoke(TxInterceptorCMT.java:104)
at org.jboss.ejb.plugins.SecurityInterceptor.invoke(SecurityInterceptor.java:117)
at org.jboss.ejb.plugins.LogInterceptor.invoke(LogInterceptor.java:191)
at org.jboss.ejb.plugins.ProxyFactoryFinderInterceptor.invoke(ProxyFactoryFinderInterceptor.
java:122)
at org.jboss.ejb.StatelessSessionContainer.internalInvoke(StatelessSessionContainer.java:322
)
at org.jboss.ejb.Container.invoke(Container.java:674)
at java.lang.reflect.Method.invoke(Native Method)
at org.jboss.mx.capability.ReflectedMBeanDispatcher.invoke(ReflectedMBeanDispatcher.java:284
)
at org.jboss.mx.server.MBeanServerImpl.invoke(MBeanServerImpl.java:549)
at org.jboss.invocation.jrmp.server.JRMPInvoker.invoke(JRMPInvoker.java:359)
at java.lang.reflect.Method.invoke(Native Method)
at sun.rmi.server.UnicastServerRef.dispatch(UnicastServerRef.java:236)
at sun.rmi.transport.Transport$1.run(Transport.java:147)
at java.security.AccessController.doPrivileged(Native Method)
at sun.rmi.transport.Transport.serviceCall(Transport.java:143)
at sun.rmi.transport.tcp.TCPTransport.handleMessages(TCPTransport.java:460)
at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run(TCPTransport.java:701)
at java.lang.Thread.run(Thread.java:479)

there is my remote method
public RowSet doGetData(String sql){
Connection conn=null;
ResultSet rs;
CachedRowSet crs;
CachedRowSet result;
try{
Hashtable env=new Hashtable();
env.put(Context.INITIAL_CONTEXT_FACTORY,"org.jnp.interfaces.NamingContextFactory");
env.put(Context.PROVIDER_URL, "jnp://127.0.0.1:1099");
//env.put("java.naming.factory.url.pkgs","org.jboss.naming rg.jnp.interfaces");
InitialContext jndiCntx = new InitialContext(env);

DataSource ds=(DataSource)jndiCntx.lookup("java:/MySqlDS");

conn=ds.getConnection();

Statement st=conn.createStatement();

rs=st.executeQuery("Select * from sm_opuser");
crs=new CachedRowSet();
crs.populate(rs);
crs.setTableName(sql);
rs.close();
st.close();
result=crs;


}catch(Exception e){
e.printStackTrace();
result=null;
}
return result;
}