How to use c api to implement socket ?

Hi,
 I want use c lib to write socket app in series60.
 but when i call connect(int, struct sockaddr *, size_t)
 api, it will locked and not work. Why?

code below:
  struct sockaddr_in srv_addr;
  memset(&srv_addr, 0, sizeof(srv_addr));
  _sock = socket(AF_INET,SOCK_STREAM,0));
  srv_addr.sin_family       = AF_INET;
  srv_addr.sin_port         = htons(port);
  srv_addr.sin_addr.s_addr  = inet_addr(srv);

  connect(_sock, (struct sockaddr *)&srv_addr, sizeof(struct sockaddr));  : stop here


Who can tell me why?

barry tan.
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