Thread: Problem in passing an object class through socket

I have a client server programm where each client can send a message to the others the problem in passing an object class through socket ,it goes well with the theory but when the server recieves the message there is an exception:

line 186:
[B]server: Data received in unknown format[/B ]

catch(ClassNotFoundException classnot)
{
System.err.println("server: Data received in unknown format");
}

to run the program first you have to run the MultiChatServerObj with no pramaters and the the MultiChatObj at the following way:
MultiChatObj name localhost
like MultiChatObj james localhost

I will be most thankfull if you find the error ,reading material on the subject doesn't help tried to put the class in a Vector and transmitt the Vevtor instead but it didn't help

bye

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