Web Development

I tried to execute both the programs.It works well if I execute it once but when I try to send some data to server second time I get a response time of '0'.why is it so?

here is my output
E:\folder>java Echoserver
Sun Feb 01 19:32:40 GMT+05:30 2004 /127.0.0.1:3442 boomboo,

Sun Feb 01 19:32:46 GMT+05:30 2004 /127.0.0.1:3443 boomboo,

E:\folder>java EchoClient 127.0.0.1 boomboo,
240 ms boomboo,

E:\folder>java EchoClient 127.0.0.1 boomboo,
0 ms boomboo,