UDP łączy się z pierwszym połączonym

Jak tworzę serwer, i podłączam się do niego z np. 2 aplikacji client, to serwer wykrywa tylko pierwszego podłączonego, reszty już nie. Co jest przyczyną?

#include <SFML\Graphics.hpp>
#include <SFML\Network.hpp>
#include <string>
#include <iostream>
#include <map>
#include <conio.h>

using namespace std;

int main()
{ 
	sf::UdpSocket socket;
	char connectionType, mode;
	char buffer[2000];
	std::size_t received;
	std::map<unsigned short, sf::IpAddress> computerID;
	std::string text = "Connected to: ";

	std::cout << "Enter (s) for Server, Enter (c) for Client" << std::endl;
	cin >> connectionType;

	unsigned short port;
	std::cout << "Set port number: ";
	cin >> port;
	socket.bind(port);
	
	if(connectionType == 's')
	{
		char answer = 'b';

		do
		{
			sf::IpAddress rIp;
			unsigned short port;
			socket.receive(buffer, sizeof(buffer), received, rIp, port);

			if(received > 0)
			{
				std::cout << "Connected to port: " << port << std::endl;
				computerID[port] = rIp;
			}

			cin >> answer;

		}while(answer != 'a');
	}
	else
	{
		std::string sIP;
		std::cout << "Enter server ip: ";
		char c;
		while(true)
		{
			c = (char)getch();
			if(c == 13)
				break;
			sIP += c;
			std::cout << "*";
		}

		sf::IpAddress sendIP(sIP);
		socket.send(text.c_str(), text.length() + 1, sendIP, 2000);
	}

	bool done = false;

	while(!done)
	{
		if(connectionType == 's')
		{
			std::getline(cin, text);
			std::map<unsigned short, sf::IpAddress>::iterator tempIterator;
			for(tempIterator = computerID.begin(); tempIterator != computerID.end(); tempIterator++)
				socket.send(text.c_str(), text.length() + 1, tempIterator -> second, tempIterator -> first);
		}
		else
		{
			sf::IpAddress tempIp;
			unsigned short tempPort;
			socket.receive(buffer, sizeof(buffer), received, tempIp, tempPort);
			if(received > 0)
				std::cout << "Received: " << buffer << std::endl;
			else 
				std::cout << "Nothing" << buffer << std::endl;
		}
	}

	system("pause");
	return 0;
} 

Luźna sugestia: Może ten nieskończony while ma coś z tym wspólnego? :D

A tak serio to od kiedy udp jest połączeniowy?

Poza tym

std::cout << "Nothing" << buffer << std::endl;

Skoro received masz nothing, to po co wyświetlasz buffer?