Cryptography in networking,client can't get message from server but

Question

Hello We are developing a simple Networking project where we are chaining CipherStreams to ObjectStream. When client gets connected to the server the server will send initial message to client and flush (but here is the problem) but the client does not get the message and is waiting for the message input.readObject() it just stuck there, what is the reason??
---Server Code----
server = new ServerSocket( 15000, 100 );
while ( true ) {
connection = server.accept();
connection.setTcpNoDelay(true);
// Get input and output streams.
desEn.init(Cipher.ENCRYPT_MODE, desKey);
//get the raw OutputStream
outraw = connection.getOutputStream();
//chain the OutputStream to the coutDES
CipherOutputStream
CipherOutputStream coutDES = new CipherOutputStream(outraw, desEn);
//chain the coutDES CipherOutputStream to
ObjectOutputStream of output
output = new ObjectOutputStream(coutDES);
String message = "SERVER>>>DES CONNECTION SUCCESSFUL!";
output.writeObject( message );
output.flush();
-End of Server Code--
-- Client code start-
Cipher desEn = Cipher.getInstance("DES"); //encrypting
Cipher Cipher desDe = Cipher.getInstance"DES");
client = new Socket(servername, 15000);
client.setTcpNoDelay(true);
desDe.init(Cipher.DECRYPT_MODE,desKey);
cinDES = new CipherInputStream(inraw, desDe);
input = new ObjectInputStream(cinDES);
// We got stuck here the program don't go beyond this line
Object obj = input.readObject();

Answer 1

Thank you for your suggestion. But I tried to chain the BufferedStream between ObjectStream and CipherStream. The problem still exit.
In the c/s sides, there are two functions to use the socket. One is the protocol part which does the handshaking before everything is prepared. Then a JTextField object is enabled and it will also use the socket and the chained stream to commnicate with the other part.
The concrete problem is strange, it seems there is some hidden buffer which holds the message. When a message is send and flush, it doesn't go to the net, instead it is hold somewhere until an other message is send and flush. So there are some delay. So in my code I have to use sendDate("\n") to push the useful message out into to net. And on the other side, eatBoundary() to get rid of the "\n" and then getMsg() to recieve the useful message.
However, for some time the communiction stuck, both sides are waiting. But when you send another message, the previous and the new message appear on the other side. In the way, it is hard to implement the handshaking which requires reliable syncronization. You have met the same problem before? If you think it is not clear enough could you send me your email addr and I can send you the source code.
my addr; [email protected]
Thanks again!
Best