用eclipse LUNA版本做了一个Web Service的服务端，然后通过自动生成了客户端。我在客户端里写了个类，可是报错了，不知道该怎么办，求各位大神帮忙。在测试WS的时候是可以的
以下是客户端的类
public class MyJDBCClient {
/**
@param args
*/
public static void main(String[] args) {
// TODO Auto-generated method stub
try
{
MyJDBCService service = new MyJDBCServiceLocator();
MyJDBCProxy client = (MyJDBCProxy) service.getMyJDBC();
String readResult = client.read(1);
System.out.println(readResult);
String writeResult = client.write(9, "JACK ROSE", "E:/Folder/some.doc");
System.out.println(writeResult);
}
catch (Exception e)
{
System.err.println("Execution failed. Exception: " + e);
}
}
}
以下是抛出的异常：
警告: Unable to find required classes (javax.activation.DataHandler and javax.mail.internet.MimeMultipart). Attachment support is disabled.
Execution failed. Exception: java.lang.ClassCastException: server.MyJDBCSoapBindingStub cannot be cast to server.MyJDBCProxy
该如何解决，求指导