急急急！！MYECLIPSE的EJB部署问题

Question

我用ＭＹＥＣＬＩＰＳＥ的ＥＪＢＰＲＯＪＥＣＴ做个ＥＪＢ的一个简单应用，在ＪＢＯＳＳ中已成功部署，但我写了个测试类，出现以下错误：Exception in thread "main" java.lang.NoClassDefFoundError: org/jboss/serial/objectmetamodel/safecloning/SafeClone
at java.lang.Class.getDeclaredFields0(Native Method)
at java.lang.Class.privateGetDeclaredFields(Class.java:2232)
at java.lang.Class.getDeclaredField(Class.java:1852)
at java.io.ObjectStreamClass.getDeclaredSUID(ObjectStreamClass.java:1555)
at java.io.ObjectStreamClass.access$600(ObjectStreamClass.java:47)
at java.io.ObjectStreamClass$2.run(ObjectStreamClass.java:381)
at java.security.AccessController.doPrivileged(Native Method)
at java.io.ObjectStreamClass.<init>(ObjectStreamClass.java:373)
at java.io.ObjectStreamClass.lookup(ObjectStreamClass.java:268)
at java.io.ObjectStreamClass.initNonProxy(ObjectStreamClass.java:504)
at java.io.ObjectInputStream.readNonProxyDesc(ObjectInputStream.java:1546)
at java.io.ObjectInputStream.readClassDesc(ObjectInputStream.java:1460)
at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1693)
at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1299)
at java.io.ObjectInputStream.readObject(ObjectInputStream.java:339)
at org.jboss.proxy.Interceptor.readExternal(Interceptor.java:80)
at java.io.ObjectInputStream.readExternalData(ObjectInputStream.java:1753)
at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1711)
at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1299)
at java.io.ObjectInputStream.readObject(ObjectInputStream.java:339)
at org.jboss.proxy.Interceptor.readExternal(Interceptor.java:80)
at java.io.ObjectInputStream.readExternalData(ObjectInputStream.java:1753)
at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1711)
at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1299)
at java.io.ObjectInputStream.readObject(ObjectInputStream.java:339)
at org.jboss.proxy.Interceptor.readExternal(Interceptor.java:80)
at java.io.ObjectInputStream.readExternalData(ObjectInputStream.java:1753)
at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1711)
at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1299)
at java.io.ObjectInputStream.readObject(ObjectInputStream.java:339)
at org.jboss.proxy.ClientContainer.readExternal(ClientContainer.java:156)
at java.io.ObjectInputStream.readExternalData(ObjectInputStream.java:1753)
at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1711)
at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1299)
at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:1912)
at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1836)
at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1713)
at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1299)
at java.io.ObjectInputStream.readObject(ObjectInputStream.java:339)
at java.rmi.MarshalledObject.get(MarshalledObject.java:135)
at org.jnp.interfaces.MarshalledValuePair.get(MarshalledValuePair.java:72)
at org.jnp.interfaces.NamingContext.lookup(NamingContext.java:654)
at org.jnp.interfaces.NamingContext.lookup(NamingContext.java:589)
at javax.naming.InitialContext.lookup(InitialContext.java:351)
at test.main(test.java:15)
测试类的源码如下：
import javax.rmi.*;
import javax.naming.*;
import java.util.*;
import org.jboss.*;
public class test {
public static void main(String args[])
{
try
{
Properties properties = new Properties();
properties.setProperty(Context.INITIAL_CONTEXT_FACTORY,"org.jnp.interfaces.NamingContextFactory");
properties.setProperty(Context.PROVIDER_URL, "localhost");
Context ctx = new InitialContext(properties);
System.out.println("1");
Object obj=ctx.lookup("ejb/Trader");
System.out.println("2");
TraderHome h=(TraderHome)PortableRemoteObject.narrow(obj,TraderHome.class);
Trader hello=h.create();
hello.buy("liu", 15);
}
catch(Exception e)
{
System.out.println("failed");
}

}}
希望大家帮我看看．