Problem Opening I2C Device on E3800

I have written the following code in an attempt to use the iaioi2c.sys I2C driver on the E3800 Bay Trail. Everything appears good until I try to execute CreateFile which fails with an ERROR_FILE_NOT_FOUND code. What am I doing wrong?

        HDEVINFO DeviceInfoSet;

        SP_DEVINFO_DATA DeviceInfoData;

        SP_DEVICE_INTERFACE_DATA DeviceInterfaceData;

        PSP_DEVICE_INTERFACE_DETAIL_DATA DeviceInterfaceDetailData = NULL;

        PDWORD requiredSize;

        DWORD Index = 0;

        HANDLE tempHandle;

        WCHAR *i2cDevice = I2C_CONTROLLER_NUM;

        DWORD LastError;

        DWORD status = SUCCESS;

        DeviceInfoSet = SetupDiGetClassDevs((GUID*)&I2C_LPSS_INTERFACE_GUID, NULL, NULL, DIGCF_PRESENT | DIGCF_DEVICEINTERFACE);

        if (DeviceInfoSet == INVALID_HANDLE_VALUE)

            return status = INVALID_HANDLE;

        DeviceInfoData.cbSize = sizeof(SP_DEVINFO_DATA);

        SetupDiEnumDeviceInfo(DeviceInfoSet, Index, &DeviceInfoData);

        while (SetupDiEnumDeviceInfo(DeviceInfoSet, Index, &DeviceInfoData))

        {

            DeviceInterfaceData.cbSize = sizeof(SP_DEVICE_INTERFACE_DATA);

            SetupDiCreateDeviceInterface(DeviceInfoSet, &DeviceInfoData, &DeviceInfoData.ClassGuid, NULL, 0, &DeviceInterfaceData);

            // call the first time to get required buffer size

            requiredSize = (PDWORD)malloc(sizeof(DWORD));

            status = SetupDiGetDeviceInterfaceDetail(DeviceInfoSet, &DeviceInterfaceData, NULL, 0, requiredSize, NULL);

            LastError = GetLastError();

            if (status == FALSE && LastError != ERROR_INSUFFICIENT_BUFFER)

            {

                SetupDiDestroyDeviceInfoList(DeviceInfoSet);

                return LastError;

            }

            // allocate required buffer

            if (requiredSize)

                DeviceInterfaceDetailData = (PSP_INTERFACE_DEVICE_DETAIL_DATA)malloc(*requiredSize);

            if (DeviceInterfaceDetailData == NULL)

            {

                SetupDiDestroyDeviceInfoList(DeviceInfoSet);

                return status = INSUFFICIENT_MEMORY;

            }

            // call the second time to get detailed info

            DeviceInterfaceDetailData->cbSize = sizeof(SP_DEVICE_INTERFACE_DETAIL_DATA);

            status = SetupDiGetDeviceInterfaceDetail(DeviceInfoSet, &DeviceInterfaceData, DeviceInterfaceDetailData, *requiredSize, NULL, &DeviceInfoData);

            if (status == FALSE)

            {

                SetupDiDestroyDeviceInfoList(DeviceInfoSet);

                return GetLastError();

            }

            // check for i2c controller #1

            if (wcsstr(DeviceInterfaceDetailData->DevicePath, i2cDevice) != NULL)

                break;

            Index++;

        }

        tempHandle = CreateFile(DeviceInterfaceDetailData->DevicePath,

            GENERIC_READ | GENERIC_WRITE,

            0,

            NULL,

            OPEN_EXISTING,

            FILE_FLAG_OVERLAPPED,

            NULL);