WinSock на одном компе работает, а на разных - нет

serv_addr.sin_addr.s_addr = inet_addr("192.168.0.3");

//---------------------------------------------------------------------------
#include <vcl.h>
#pragma hdrstop
#include <process.h>
#include "Unit1.h"
 
//---------------------------------------------------------------------------
#pragma package(smart_init)
#pragma resource "*.dfm"
TForm1 *Form1;
TLabel *lb1;
int bytes_read;
char buff[1024];
int error;
SOCKET sock,listener;
void ServerReadThread(void* pParams);
void ClientReadThread(void* pParams);
//---------------------------------------------------------------------------
__fastcall TForm1::TForm1(TComponent* Owner)
    : TForm(Owner)
{
    lb1 = *&Label1;
}
//---------------------------------------------------------------------------
void __fastcall TForm1::Button1Click(TObject *Sender)  //я сервер
{
    WSADATA wData;
    int socket_name_size;
    struct sockaddr_in addr;
    if(WSAStartup(MAKEWORD(1,1),&wData)!=0)
    {
            //вывести ошибку
    }
    //std::cout<<"socket initialized\n";
    listener=socket(AF_INET,SOCK_STREAM,NULL);  //create socket
    //std::cout<<"socket created\n";
    addr.sin_family=AF_INET;
    addr.sin_port=htons(3000);  //number port
    addr.sin_addr.s_addr=htonl(INADDR_ANY);
    socket_name_size=sizeof(addr);
    if(bind(listener,(struct sockaddr *)&addr,socket_name_size)<0)  //binding
    {
        //вывести ошибку
    }
    //std::cout<<"socket bind\n";
    listen(listener,1);
    _beginthread(ServerReadThread, 0, NULL);
    Button1->Enabled = false;
    Button2->Enabled = false;
    Button4->Enabled = false;
    Form1->Caption = "Server";
}
//---------------------------------------------------------------------------
void ServerReadThread(void* pParams)
{
    sock=accept(listener,NULL,NULL);
    if(sock<0)
    {
        error=WSAGetLastError(); //вывести ошибку
    }
    while(true)
    {
 
        bytes_read=recv(sock,buff,40,0);
        if(bytes_read<0)
        {
            break;
        }
        lb1->Caption = buff;
    }
}
 
void __fastcall TForm1::Button2Click(TObject *Sender)  //client
{
    WSADATA wData;
    struct sockaddr_in addr,serv_addr;
   //   SOCKET sock;
    if(WSAStartup(MAKEWORD(1,1),&wData)!=0)
    {
//error
    }
 
    sock=socket(AF_INET,SOCK_STREAM,0);
    if(sock==-1)
    {
    //error
    }
    addr.sin_family=AF_INET;
    addr.sin_port=htons(3000);
    addr.sin_addr.s_addr=htonl(INADDR_LOOPBACK);
    bind(sock,(struct sockaddr *)&addr,sizeof(addr));
    char HostName[1024];
    DWORD HostIP = 0;
    LPHOSTENT lphost;
    gethostname(HostName, 1024);
    lphost=gethostbyname(HostName);
    serv_addr.sin_family=AF_INET;
    memcpy((char*)&serv_addr.sin_addr,lphost->h_addr,lphost->h_length);
    serv_addr.sin_port=htons(3000);
    ////
   ///  serv_addr.sin_addr.s_addr = inet_addr("192.168.0.3");
    ////
    int error;
    if(connect(sock,(struct sockaddr *)&serv_addr,sizeof(serv_addr))<0)
    {
        //error
        error=WSAGetLastError();
    }
//  std::cout<<"connect success\n";
    Button1->Enabled = false;
    Button2->Enabled = false;
    Button3->Enabled = false;
    _beginthread(ClientReadThread, 0, NULL);
    Form1->Caption = "Client";
}
//---------------------------------------------------------------------------
 
 
void __fastcall TForm1::Button4Click(TObject *Sender)
{
    static char temp_text[100] = {"Hello! i am client!"};
    send(sock,temp_text,strlen(temp_text),0);
}
//---------------------------------------------------------------------------
 
 
void __fastcall TForm1::Button3Click(TObject *Sender)
{
    static char temp_text[100] = {"Hello! i am server!"};
    send(sock,temp_text,strlen(temp_text),0);
}
//---------------------------------------------------------------------------
void ClientReadThread(void* pParams)
{
    while(true)
    {
        recv(sock,buff,sizeof(buff),0);
        lb1->Caption = buff;
    }
}

WSADATA wData;
    struct sockaddr_in addr,serv_addr;
    memset(&addr,0,sizeof(addr));      ///apd
    WSAStartup(MAKEWORD(2,0),&wData);          //apd 
    sock=socket(AF_INET,SOCK_STREAM,0);
    addr.sin_family=AF_INET;
    addr.sin_port=htons(3000);
    addr.sin_addr.s_addr=htonl(INADDR_LOOPBACK);
    addr.sin_addr.s_addr=inet_addr("192.168.0.3");   //apd
    bind(sock,(struct sockaddr *)&addr,sizeof(addr));
    connect(sock,(struct sockaddr *)&addr,sizeof(addr));  //apd

addr.sin_addr.s_addr=htonl(INADDR_LOOPBACK);

addr.sin_addr.s_addr=htonl(INADDR_LOOPBACK);
addr.sin_addr.s_addr=inet_addr("192.168.0.3");