BeginReceive method of C # under Socket object

What the hell is going on with the object? Just happen on my machine, modify the IP configuration and put it on the other machine is no problem, can be a good callback. What's so unusual about my machine? Ask the Master!

A thread under the socket object User.sock begins executing the beginreceive statement:

User.sock.BeginReceive (user.buffer,0,user.buffersize,0,new system.asynccallback (dorecevive), user);


The corresponding callback function:

public static void Dorecevive (IAsyncResult ar)
{
Console.WriteLine ("Begin Receive Date, waiting for the called back");
//...

}

After beginreceive on my machine, the dorecevive function is not executed, and the function can be performed well on other machines and

Play "Begin Receive Date, waiting for the called back" string