Ensure you are using the USB port on the REAR of the DVD player.
First, extract the upgrade ZIP file contents - it will contain an UPG_ALL folder with a .bin file inside. Just copy that folder to the root directory of your USB stick and try the upgrade again... Be sure that NO disc is in your DVD player at the time. Also ensure that the USB stick does not contain any other files.
Hope that helps!
It is only possible to send the folder as a zipped attachment.
I will open this question up to the other experts to see if they have any idea.
The other experts have reviewed this question page, unfortunately they have nothing else to add.
The procedure you are following is correct, so I am not sure why the software is not working for you.
Where did you download it from? Have you tried using a different memory stick?