Multithread heap assertion failure

HI, all of you,

I have created a Win32 console project with MFC support(shared dll) to
test my multithread programming.
When run, a "Debug assertion failure" occures at the following
expression:
_ASSERTE(_CrtIsValidHeapPointer(pUserData));

I cannot figure out why the exception occurs. Can you shed some light
on me?

Any help appreciated. Thansk in advance.

^_^

The only source file is as follows:

//--------------------------------------------------
#include <afx.h>
#include <afxmt.h>
#include <afxwin.h>
#include <windows.h>

#include <iostream>
using namespace std;

class CTestThread: public CWinThread{
public:
    CTestThread(){}
    virtual ~CTestThread(){}

    int Run(){
        cout << "run..." << endl;
        return 1;
    }

    BOOL InitInstance(){
        cout << "init..." << endl;
        return TRUE;
    }

    int ExitInstance(){
        cout << "exit inst..." << endl;
        return 0;
    }
};

int main(){
    int nWorkerNum = 2;
    CTestThread * m_pThread = new CTestThread[nWorkerNum];
    HANDLE * m_pThreadHandle = new HANDLE[nWorkerNum];
    for(int i = 0; i < nWorkerNum; i ++){
        m_pThread[i].CreateThread();
        m_pThreadHandle[i] = m_pThread[i].m_hThread;
    }
    WaitForMultipleObjects(nWorkerNum, m_pThreadHandle, TRUE, INFINITE);
    cout << "Press any key to conitnue..." << endl;
    char c; cin >> c;
}
//--------------------------------------------------