[Purchased Rubber Ducky FAIL!]

If its getting recognised as at32uc3b - your in dfu mode. Check the ducks small black button, looks like its jammed under the metal housing. Use a pin/paper-clip to wiggle the little black button, and hopefully your good to go!

Hello there thank you very much for your reply. I do not know exactly what you mean:

If you think a small black switch is set, the switch I tried several times, but nothing changed?

[Purchased Rubber Ducky FAIL!]

Hello, I think, I have exactly same problem:
I have two "Rubber Ducky's stick". I have followed the instructional video. I created a very simple scripts (Hello World!) and I have successfully created payload (inject.bin). I put the SD card from the reader to the Rubber Ducky and put it into the pc with Windows 7. I did not get anything. Ducky off, no light.
Windows signalized USB connection and want to want to install new driver (named at32uc3b), which is not in Windows update repository.
So I downloaded this driver from the Internet and installed separately. Nothing has changed.
I tried to repeat the process several times. I tried create more different payloads. I tried the second one ducky several times.

I can not get nothing. No response. No action. Can You help me, please? Thank You!