Steinberg Product Activation FAQ

I’ve just bought a Zoom H4N Pro recorder and with Cubase LE & WaveLab LE download codes.

My computer is WIN10, 64 BIT. Following guide to download WaveLab Le, ENTER the download code, then got an activation code. Installed, activated and working. Same time the Steinberg download assistant was installed too. From Steinberg download assistant I DOWNLOAD Cubase LE and installed. Than run it, it asked an activation code. I have a download code but have no activate code. How can I get one?
I have tried to download Cubase LE from the website but still no chance to enter the download code to get an activation code just like when I download WaveLab LE. I need you help. Thanks.