How can I pick up the Ctrl Alt Del Keys?

[Lizzy]

So I was playing as I usually do in my PC; and decided that I want to get the Ctrl Alt Del achievement. And I picked up Ctrl by pressing my physical control key while Ctrl was on screen. When Alt showed up, however, pressing Alt didn't add the key. It gave me 5 points, but it didn't add up to the Ctrl Alt Del progress.

Noteworthy is to say, my keyboard has the Supr key instead of Del. It's a hispanic keyboard. Should still work.

What am I doing wrong?

[FerroCentric]

You have to click the key on the screen, not on your keyboard