Why My Qt Application Don't SHow?

[dragon_hua]

Hi,
I am a new one ,studying the Qt and OpenCV.I just put the OpenCV2.2 integration in Qt4.7.The steps likes this:Creating a QGui Application and in the .pro file add the INCLUDEPATH=INCLUDEPATH +=C:/OpenCV2.2/include
INCLUDEPATH +=C:/OpenCV2.2/include/opencv
LIBS +=C:/OpenCV2.2/bin/*.dll
I want to show the image using the OpenCV function and the codes likes:

void Widget::slot_showimage()
{
    img=cvLoadImage("11.bmp");
    cvNamedWindow("11.bmp",0);
    cvShowImage("11.bmp",img);
    cvWaitKey(0);
    //QTimer::singleShot(100000,this,SLOT(close()));
    cvDestroyWindow("11.bmp");
}

void Widget::slot_showimage()
{
    img=cvLoadImage("11.bmp");
    cvNamedWindow("11.bmp",0);
    cvShowImage("11.bmp",img);
    cvWaitKey(0);
    //QTimer::singleShot(100000,this,SLOT(close()));
    cvDestroyWindow("11.bmp");
}

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the Compile passed but it doesn't show the image window and the exited code likes this:
Starting E:\Qt_pratise\untitled4\debug\untitled4.exe...
E:\Qt_pratise\untitled4\debug\untitled4.exe exited with code -1073741515

I don't know why?