为什么套接字关闭Erlang ?

I'm new in Erlang. My Problem is, that when I start the client for the 1st time everything seems okay, I get the sorted list: <<1,5,72,97,108,108,111>>. But by the 2nd time it won't receive the sorted list, because I think the socket is closed. The output from the Client is "Connection closed".I'm new in Erlang. My Problem is, that when I s