这段代码的异常是什么！一个全局实例，调用时会出现异常

#ifndef _OUT_LIB_H_
#define _OUT_LIB_H_

//#include "stdafx.h"
#include "IoHandle.h"
#include "Session.h"
#include "Network.h"
#include "RecvBuf.h"
#include "SendBuf.h"
#include "MyObject.h"


//class AsioNetwork;
class MeNetObject;
//class IoHandle;
//class RecvBuffer;
//class SendBuffer;
//class Session;

namespace ASIO_NET
{
    class COutLib
    {
    public:
        COutLib();
        ~COutLib();
        static COutLib    *    Instance();
        AsioNetwork        *    InstanceNetWork();
        NetObject        *    InstanceNetObject();
        IoHandle        *    InstanceIoHandle();
        Session            *    InstanceSession();
        RecvBuffer        *    InstanceRecvBuffer();
        SendBuffer        *    InstanceSendBuffer();
        
    private:
        static COutLib    *    g_pInstance;
        AsioNetwork        *    g_pNetWorkInstance;
        MeObject        *    g_pNetObjectInstance;
        IoHandle        *    g_pIoHandleInstance;
        Session            *    g_pSessionInstance;
        RecvBuffer        *    g_pRecvBufferInstance;
        SendBuffer        *    g_pSendBufferInstance;
        
    };
    /***************************************************************************************************************************/
    COutLib* COutLib::g_pInstance = 0;
    COutLib::COutLib()
    {

        //    g_pInstance = new COutLib();
            g_pNetWorkInstance = new AsioNetwork();
            g_pNetObjectInstance = new MeObject();
            g_pIoHandleInstance = new IoHandle();
            g_pSessionInstance = new Session(1,g_pIoHandleInstance);
            g_pRecvBufferInstance = new RecvBuffer();
            g_pSendBufferInstance = new SendBuffer();
            


    }
    COutLib::~COutLib()
    {
        if(g_pInstance != NULL)
        {
        //    delete g_pInstance;
            delete g_pNetWorkInstance;
            delete g_pNetObjectInstance;
            delete g_pIoHandleInstance;
            delete g_pSessionInstance;
            delete g_pRecvBufferInstance;
            delete g_pSendBufferInstance;
            
        }

    }
    /***************************************************************************************************************************/
    inline
    COutLib*
    COutLib::Instance()
    {
        return g_pInstance;
    }
    /***************************************************************************************************************************/
    inline
    AsioNetwork*
    COutLib::InstanceNetWork()
    {
        return g_pNetWorkInstance;
    }
    ///***************************************************************************************************************************/
    inline
    NetObject*
    COutLib::InstanceNetObject()
    {
        return g_pNetObjectInstance;
    }
    ///***************************************************************************************************************************/
    inline
    IoHandle*
    COutLib::InstanceIoHandle()
    {
        return g_pIoHandleInstance;
    }
    ///***************************************************************************************************************************/
    inline
    RecvBuffer*
    COutLib::InstanceRecvBuffer()
    {
        return g_pRecvBufferInstance;
    }
    ///***************************************************************************************************************************/
    inline
    SendBuffer*
    COutLib::InstanceSendBuffer()
    {
        return g_pSendBufferInstance;
    }
    ///***************************************************************************************************************************/
    inline
    Session*
    COutLib::InstanceSession()
    {
        return g_pSessionInstance;
    }
    ///***************************************************************************************************************************/

}

#endif