UDP communication using c++ boost asio

I need to communicate with a different device in a private network over UDP. I am new to using boost, but based on what I searched online and also the tutorials on Boost website, I came up with below code.. I am currently trying to send and receive data from my own device. Just to unit test and finalize the code.

Question: I am unable to receive any message. What am I missing?

#include <iostream>
#include <cstdio>
#include <cstdlib>
#include <string>
#include "boost/asio.hpp"
#include <thread>
#include <boost/array.hpp>
#include <boost/bind.hpp>

#define SRVR_UDP_PORT  10251
#define CLNT_UDP_PORT 10252

boost::array<char, 1024> recv_buffer;

void Sender(std::string in)
{
    boost::asio::io_service io_service;
    boost::asio::ip::udp::socket socket(io_service);
    boost::asio::ip::udp::endpoint remote_endpoint;
    socket.open(boost::asio::ip::udp::v4());
    remote_endpoint = boost::asio::ip::udp::endpoint(boost::asio::ip::address::from_string("192.168.1.64"), SRVR_UDP_PORT);

    boost::system::error_code err;
    socket.send_to(boost::asio::buffer(in.c_str(), in.size()), remote_endpoint, 0, err);
    socket.close();
    //int i =0;
    printf("Sending Payload --- \n");
}

void handle_receive(const boost::system::error_code& error, size_t bytes_transferred)
{
    std::cout << "Received: '" << std::string(recv_buffer.begin(), recv_buffer.begin()+bytes_transferred) << "'\n";
}


void Receiver()
{
    while(1)
    {
        boost::asio::io_service io_service;
        boost::asio::ip::udp::socket socket(io_service);
        boost::asio::ip::udp::endpoint remote_endpoint;

        //socket.open(boost::asio::ip::udp::v4());
        boost::system::error_code err;
        remote_endpoint = boost::asio::ip::udp::endpoint(boost::asio::ip::address::from_string("192.168.1.64"), CLNT_UDP_PORT);

        socket.open(boost::asio::ip::udp::v4());
        //http://ift.tt/2rCt9Yk
        socket.async_receive_from(boost::asio::buffer(recv_buffer),
                                    remote_endpoint,
                                    boost::bind(handle_receive,
                                    boost::asio::placeholders::error,
                                    boost::asio::placeholders::bytes_transferred));                                    
                                    //socket.close();
    }
    int i = 0;
    printf("Received Payload --- %d", i);

}

int main(int argc, char *argv[])
{
    //std::thread s(Sender);
    std::thread r(Receiver);
    //s.join();
    std::string input = argv[1];
    printf("Input is %s\nSending it to Sender Function...\n", input.c_str());
    Sender(input);
    r.join();
    return 0;
}