General Discussion - Windows 7 issue

The following code gives an error on Windows 7, but works fine on Windows Vista and below. Any ideas would be appreciated :(, there is more code to this but we broke it down to bare minimum so others can try to help us.

CComPtr<IMalloc> spIMalloc;
HRESULT hResult = ::SHGetMalloc(&spIMalloc);
LPITEMIDLIST progFolder = NULL;
hResult = ::SHGetSpecialFolderLocation(NULL, CSIDL_PRINTERS, &progFolder );
CComPtr<IShellFolder> spIShellFolder;
CComPtr<IShellFolder> spFolderProgram;
hResult = ::SHGetDesktopFolder(&spIShellFolder);
hResult = spIShellFolder->BindToObject(progFolder, NULL, IID_IShellFolder, (void **)&spFolderProgram );
CComPtr<IEnumIDList> spIEnumIDList;
hResult = spFolderProgram->EnumObjects(NULL, SHCONTF_NONFOLDERS, &spIEnumIDList );
ULONG ulCount = 0;
LPITEMIDLIST listNoFolder = NULL;
hResult = spIEnumIDList->Next(1, &listNoFolder, &ulCount ); // hResult shows an error
spIMalloc->Free(progFolder);