每当我尝试从客户端调用我的ejb时，都会出现此错误：

  java.rmi.MarshalException: Failed to communicate.

    Problem during     marshalling/unmarshalling; nested exception is:

    java.io.InvalidClassException: com.afrikbrain.util.message.MessageInfo;

    local     class incompatible:

   stream classdesc serialVersionUID = 2285009932770474121,

   local class     serialVersionUID = -2900394430145132451 at

  org.jboss.remoting.transport.socket.SocketClientInvoker.handleException(SocketClientInvoker
.java:122)

为什么会发生？以及如何解决呢？