Why showing 10014 socket error?

#include "cUDPReceiver.h"


cUDPReceiver::cUDPReceiver(void)
{
}


cUDPReceiver::~cUDPReceiver(void)
{
}
void cUDPReceiver::Initializing(SOCKET		_socket )
{
	m_socket = _socket;
	ZeroMemory(&m_overlapped,sizeof(m_overlapped));

	m_nFlags = 0;	
	m_wsaBuf.len		= BUF_SIZE;
	m_wsaBuf.buf		= m_buf;

	OnRecv();
}
void cUDPReceiver::OnRecv()
{
	DWORD   dwBytes = 0, dwFlags = 0;
	int returnValue = 0;

	ZeroMemory(&m_overlapped,sizeof(m_overlapped));
	ZeroMemory(&m_lastSenderAddr,sizeof(m_lastSenderAddr));
	m_addrSize = sizeof(m_lastSenderAddr);

	m_wsaBuf.buf		= m_queueBuffer.GetBufferPoint();
	m_wsaBuf.len		= m_queueBuffer.GetRecvBytes();	

	__LOCK;
	returnValue = WSARecvFrom(m_socket,
		&m_wsaBuf,
		1,
		&dwBytes,
		&dwFlags,
		(SOCKADDR *)&m_lastSenderAddr,
		&m_addrSize, 
		&m_overlapped,
		NULL);

	__UNLOCK;

	if ( returnValue ==  SOCKET_ERROR )
	{
		if( WSAGetLastError() != WSA_IO_PENDING )
		{		
			//WSACleanup();
			OnRecv();
		}
	}
}
void cUDPReceiver::OnSend(SOCKADDR_IN		_addr, char* pData,const int _nSize)
{
	DWORD   dwBytes = 0;
	int returnValue = 0;

	__LOCK;

	m_wsaBuf.buf = pData;
	m_wsaBuf.len = _nSize;    

	returnValue = WSASendTo(m_socket, &m_wsaBuf, 1,
		&dwBytes, 0, (SOCKADDR *) & _addr,
		sizeof(_addr), &m_overlapped, NULL);

	__UNLOCK;

	if( returnValue == SOCKET_ERROR)
	{
		if(WSAGetLastError() != WSA_IO_PENDING)
		{
			printf("Error - fail wsasend \n");
		}
	}
}
void cUDPReceiver::SetLength(DWORD _dwSize)
{
	m_wsaBuf.len = _dwSize;
	m_queueBuffer.PushData(_dwSize);
}
char*		cUDPReceiver::GetBuffer()
{
	return m_queueBuffer.PopData();
}
SOCKADDR_IN cUDPReceiver::GetLastAddr()
{
	return m_lastSenderAddr;
}

void cUDPReceiver::Dispatch(char* pData)
{
}