Function of USB Composite Device fails to start if not first function on device

/* pConfigurationDescriptor points to the descriptor previously
   requested from the driver. */
PUSB_CONFIGURATION_DESCRIPTOR pConfigurationDescriptor;

/* pInterfaceList points to an array with
    pConfigurationDescriptor->bNumInterfaces entries. */
PUSBD_INTERFACE_LIST_ENTRY pInterfaceList;

PUSB_INTERFACE_DESCRIPTOR pInterfaceDescriptor;
LONG InterfaceNumber = 0;
LONG NumInterfaces = 0;

PURB pUrb;

PUCHAR pStartPosition = (PUCHAR)pConfigurationDescriptor;

NumInterfaces = pConfigurationDescriptor->bNumInterfaces;

pInterfaceList = AllocPool (NumInterfaces * sizeof(USBD_INTERFACE_LIST_ENTRY));

for (InterfaceNumber = 0;
     InterfaceNumber < NumInterfaces;
     InterfaceNumber++
     )
{
    /* Get the next matching descriptor. Here we implicitly use
       the fact that the interface descriptors are laid out in
       order in memory.
    */
    pInterfaceDescriptor = USBD_ParseConfigurationDescriptorEx (
                               pConfigurationDescriptor,
                               pStartPosition, // start of search within Config Descriptor
                               -1, // interface number
                                0, // alternate setting
                               -1, // interface class
                               -1, // interface subclass
                               -1, // interface protocol
                           );
    pInterfaceList.Interface[InterfaceNumber] = pInterfaceDescriptor;
    if (!pInterfaceDescriptor)
    {
        break;
    }
    pStartPosition = (PUCHAR)pInterfaceDescriptor + pInterfaceDescriptor->bLength;
}

// allocate the URB
pUrb = USBD_CreateConfigurationRequestEx(
           pConfigurationDescriptor,
           pInterfaceList
       );

/*++

Routine Description:
This helper routine selects the specified configuration.

Arguments:
ConfigurationDescriptor - Pointer to the configuration
descriptor for the device. The caller receives this pointer
from the URB_FUNCTION_GET_DESCRIPTOR_FROM_DEVICE request.

Return Value: NT status value
--*/

NTSTATUS
SelectConfigurationOnDevice ( IN PUSB_CONFIGURATION_DESCRIPTOR ConfigurationDescriptor)
{
    PURB urb = NULL;
    NTSTATUS                     ntStatus;
    PUSBD_INTERFACE_LIST_ENTRY   ListOfInterfaces = NULL; 
    PUSB_INTERFACE_DESCRIPTOR    InterfaceDescriptor = NULL;
    PUSBD_INTERFACE_INFORMATION  Interface = NULL;
    LONG                         interfaceIndex;
    LONG                         numOfInterfaces;
    USBD_PIPE_HANDLE             pipeHandle;

    PUCHAR StartPosition = (PUCHAR)ConfigurationDescriptor;

    //1. Get the number of interfaces in the configuration
    numOfInterfaces = ConfigurationDescriptor->bNumInterfaces;

    //2. Allocate for the array
    ListOfInterfaces = (PUSBD_INTERFACE_LIST_ENTRY)ExAllocatePool (
        NonPagedPool, 
        sizeof(USBD_INTERFACE_LIST_ENTRY) *
        (numOfInterfaces + 1));

    if(!ListOfInterfaces)
    {
        //Failed to allocate memory for pInterfaceList

        ntStatus = STATUS_INSUFFICIENT_RESOURCES;
        goto done;
    }

    // 3. Initialize the array by setting all members to NULL.
    RtlZeroMemory(ListOfInterfaces, sizeof (
        USBD_INTERFACE_LIST_ENTRY) *
        (numOfInterfaces + 1));


    // 4. Enumerate interfaces in the configuration.
    for ( interfaceIndex = 0; 
          interfaceIndex < numOfInterfaces; 
          interfaceIndex++) 
    {
        InterfaceDescriptor = USBD_ParseConfigurationDescriptorEx(
            ConfigurationDescriptor, 
            StartPosition, // StartPosition 
            -1,  // InterfaceNumber
             0,  // AlternateSetting
            -1,  // InterfaceClass
            -1,  // InterfaceSubClass
            -1); // InterfaceProtocol

        if (!InterfaceDescriptor) 
        {
            ntStatus = STATUS_INSUFFICIENT_RESOURCES;
            goto done;
        }

        StartPosition = (PUCHAR)InterfaceDescriptor + InterfaceDescriptor->bLength;

        //5. Populate the element in the array.
        ListOfInterfaces[interfaceIndex].InterfaceDescriptor = InterfaceDescriptor;
    }
...

/* pConfigurationDescriptor points to the descriptor previously
   requested from the driver. */
PUSB_CONFIGURATION_DESCRIPTOR pConfigurationDescriptor;

/* pInterfaceList points to an array with
    pConfigurationDescriptor->bNumInterfaces entries. */
PUSBD_INTERFACE_LIST_ENTRY pInterfaceList;

PUSB_INTERFACE_DESCRIPTOR pInterfaceDescriptor;
LONG InterfaceNumber = 0;
LONG NumInterfaces = 0;

PURB pUrb;

PUCHAR pStartPosition = (PUCHAR)pConfigurationDescriptor;

NumInterfaces = pConfigurationDescriptor->bNumInterfaces;

pInterfaceList = AllocPool (NumInterfaces * sizeof(USBD_INTERFACE_LIST_ENTRY));

for (InterfaceNumber = 0;
     InterfaceNumber < NumInterfaces;
     InterfaceNumber++
     )
{
    /* Get the next matching descriptor. Here we implicitly use
       the fact that the interface descriptors are laid out in
       order in memory.
    */
    pInterfaceDescriptor = USBD_ParseConfigurationDescriptorEx (
                             pConfigurationDescriptor,
                             pStartPosition,
                             -1, // interface number
                              0, // alternate setting
                             MY_FUNCTION_CLASS,    // interface class
                             MY_FUNCTION_SUBCLASS, // interface subclass
                             MY_FUNCTION_PROTOCOL, // interface protocol
                         );
    pInterfaceList.Interface[InterfaceNumber] = pInterfaceDescriptor;
    if (!pInterfaceDescriptor)
    {
        break;
    }
    pStartPosition = (PUCHAR)pInterfaceDescriptor + pInterfaceDescriptor->bLength;
}

// allocate the URB
pUrb = USBD_CreateConfigurationRequestEx(
           pConfigurationDescriptor,
           pInterfaceList
       );