Question : The remote server returned an error: NotFound.

This error is occured in Services's Reference.cs file
at
 public long EndInsertEmployee(System.IAsyncResult result) {
                object[] _args = new object[0];
                long _result = ((long)(base.EndInvoke("InsertEmployee", _args, result)));
                return _result;
            }
function

Answer : The remote server returned an error: NotFound.

No, you haven't MaxBuffersize in your service web.config.
if you look carefully at the link you will see that you must set this on both client and service web.config.