CSingleLock doesn't seem to work

hi,

how come my program never displays:

"singleLock.IsLocked"

here it is

thx!

CWinApp theApp;
CCriticalSection c;
UINT MyControllingFunction( LPVOID pParam );

int _tmain(int argc, TCHAR* argv[], TCHAR* envp[])
{
    int nRetCode = 0;

    // initialize MFC and print and error on failure
    if (!AfxWinInit(::GetModuleHandle(NULL), NULL, ::GetCommandLine(),
0))
    {
        // TODO: change error code to suit your needs
        _tprintf(_T("Fatal Error: MFC initialization failed\n"));
        nRetCode = 1;
    }
    else
    {
        // TODO: code your application's behavior here.

        CWinThread* mythread = AfxBeginThread(MyControllingFunction,0);
        Sleep(2000);
        cout <<"entering loop...\n";
        for (int i=0;i<20;i++) {
            CSingleLock singleLock(&c);
            Sleep(1000);
            if (singleLock.IsLocked())
                cout << "singleLock.IsLocked.\n";
            else
                cout << "singleLock.IsUnLocked.\n";

        }
    }

    cin.ignore();
    return nRetCode;
}

UINT MyControllingFunction( LPVOID pParam ) {
    CSingleLock s(&c);
    if (!s.IsLocked()) {
        cout <<"locking...\n";
        if (s.IsLocked())
            cout <<"confirming lock\n";
        Sleep (10000);
        cout <<"unlocking...\n";

    }
    return 0;

}

here is the output

locking...
entering loop...
singleLock.IsUnLocked.
singleLock.IsUnLocked.
singleLock.IsUnLocked.
singleLock.IsUnLocked.
singleLock.IsUnLocked.
singleLock.IsUnLocked.
singleLock.IsUnLocked.
unlocking...
singleLock.IsUnLocked.
singleLock.IsUnLocked.
singleLock.IsUnLocked.
....