Why I can't find device used CCyUSBDevice

[Anonymous]

This is the test code.

when I didn't load the IMG the result is like this:

but when I loaded the IMG ,the reslut is like this:

This IMG can work!

Could you tell me why the empty it can find the device,instead the loading right IMG can't find device?

Thank you !

The console  code:

#include "stdafx.h"

#include <iostream>

using namespace std;

#include "CyAPI.h"

int _tmain(int argc, _TCHAR* argv[])

{

  CCyUSBDevice* pUSB = new CCyUSBDevice;

  int nDeviceCount = pUSB->DeviceCount();

  cout<<nDeviceCount<<endl;

  for (int nIdx = 0; nIdx < pUSB->DeviceCount(); nIdx++)

  {

  pUSB->Open(nIdx);

  printf("%s\n", pUSB->DeviceName);

  printf("%d\n", pUSB->VendorID);

  printf("%d\n", pUSB->ProductID);

  }

  getchar();

  return 0;

}