ZeroMQ publisher problem

#include "stdafx.h"

#include <iostream>
#include <stdint.h>
#include <autolink_zeromq.hpp>

#include "zmq.hpp"

using namespace std;

int _tmain(int argc, _TCHAR* argv[])
{
    const size_t buffer_size = 1 * 1024 * 1024;
    const uint64_t high_water_mark = 4;

    try
    {
        zmq::context_t c(4);
        zmq::socket_t sock(c, ZMQ_PUB);
        sock.bind("epgm://224.9.8.7:1234");
        sock.setsockopt(ZMQ_HWM, &high_water_mark, sizeof(high_water_mark));

        // NEVER ENDING!
        while (true)
        {
            zmq::message_t* t = new zmq::message_t(buffer_size);
            memset(t->data(), '!', buffer_size);

            if (!sock.send(*t))
            {
                Sleep(1000);
            }

            delete t;
        }

        sock.close();
    }
    catch (zmq::error_t e)
    {
        cerr << e.what();
    }

    return 0;
}