소켓예제에서 잘 안되요.. 도와주세요.

#include <stdio.h>
#include <stdlib.h>
#include <errno.h>
#include <string.h>
#include <sys/types.h>
#include <netinet/in.h>
#include <sys/socket.h>
#include <sys/wait.h>

#define MYPORT 3490 /* the port users will be connecting to */

#define BACKLOG 10 /* how many pending connections queue will hold */
#define MAXDATASIZE 100

main()
{
int sockfd, new_fd; /* listen on sock_fd, new connection on new_fd */
struct sockaddr_in my_addr; /* my address information */
struct sockaddr_in their_addr; /* connector's address information */
int sin_size;
int numbytes;

char buf[MAXDATASIZE];

if ((sockfd = socket(AF_INET, SOCK_STREAM, 0)) == -1) {
perror("socket");
exit(1);
}

my_addr.sin_family = AF_INET; /* host byte order */
my_addr.sin_port = htons(MYPORT); /* short, network byte order */
my_addr.sin_addr.s_addr = INADDR_ANY; /* auto-fill with my IP */
bzero(&(my_addr.sin_zero), 8); /* zero the rest of the struct */

if (bind(sockfd, (struct sockaddr *)&my_addr, sizeof(struct sockaddr)) \
== -1) {
perror("bind");
exit(1);
}

if (listen(sockfd, BACKLOG) == -1) {
perror("listen");
exit(1);
}

while(1) { /* main accept() loop */
sin_size = sizeof(struct sockaddr_in);
if ((new_fd = accept(sockfd, (struct sockaddr *)&their_addr, \
&sin_size)) == -1) {
perror("accept");
continue;
}
printf("server: got connection from %s\n", \
inet_ntoa(their_addr.sin_addr));
if (!fork()) { /* this is the child process */

if ((numbytes=recv(new_fd,buf,MAXDATASIZE,0)) == -1) {
perror("recv");
exit(1);

if (send(new_fd, "Hello, world!\n", 14, 0) == -1)
perror("send");
close(new_fd);
exit(0);
}
} <====== 상단 fork 부터 send 함수가 되지 않습니다. 자식 프로세스도 죽지 않구요... 어찌 해결을 봐야 하는지요?
close(new_fd); /* parent doesn't need this */

while(waitpid(-1,NULL,WNOHANG) > 0); /* clean up child processes */
}
}