OpenCV frame capture from AVI

I am working on a project with openCV 2.2. I need to do processing on each frame of an AVI file but when I run my code it only grabs the first frame of the file. The CV_CAP_PROP_POS_FRAMES does not seem to be working. Any ideas why not?

    CvCapture* capture = cvCaptureFromAVI("test1.avi");
 
     IplImage *img = 0;
 
     if (!cvGrabFrame(capture)) {
             printf("Error: Couldn't open the image file.\n");
             return 1;
     }
 
     int numFrames = (int) cvGetCaptureProperty(capture, CV_CAP_PROP_FRAME_COUNT);
     int posFrame = 1;
     for(int i =0; i <= numFrames; i++){
         cvSetCaptureProperty(capture, CV_CAP_PROP_POS_FRAMES, i);
               posFrame = cvGetCaptureProperty(capture, CV_CAP_PROP_POS_FRAMES);
 
               img = cvGrabFrame(capture);
               cvNamedWindow("Image:", CV_WINDOW_AUTOSIZE);
               cvShowImage("Image:", img);
               printf("%i\n",posFrame);
 
               cvWaitKey(0);
 
               cvDestroyWindow("Image:");
     }
 

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