HELP updating firmware on scales with win8.1

Hi I am trying to update my scales module.
I have downloaded the package and have installed the tiny driver for win8
When i go to program the scales module in bootloader mode i get errors …

==> Error occurred during update.
Invalid DFU suffix signature
A valid DFU suffix will be required in a future dfu-util release!!!
No DFU capable USB device available

Is this a problem with win8.1 ?
Kind regards
Adam V

I dont even see a USB device when connecting the module … wierd !
Will post this in the firmware section … sorry about that

The DFU error just means that your computer is not detecting the device and it can be caused by a number of things. Sometimes different USB cables or ports can do the trick, sometimes USB hubs or other connected devices can confuse things.

hmm ok thankyou … i will try some more options … am using two hubs but both dont recognise the module when plugged in … will try without hub and see ! cheers