I'm assuming you followed this procedure:
1. Disconnect adapter from USB port
2. Attach drive to adapter
3. Connect adapter to USB port (don't use a hub, connect directly to the computer)
Does the drive spin up? If not you've got a faulty adapter (assuming the drive is ok).
... bloody faulty adapter it be. It was the cheapest they had, but still, €24 comma something for a piece of **** is still dearly paid. Since I opened up the package I assume they will not be taking it back
Normally I'm not too fond of red lights, but on this device I would gladly have seen it.
I've sent an email to the German manufacturer's HQ, asking for help.