Hi - I guess I'm only to dumb, but I've tried this for nearly an hour now.

I've already found the hidden switch. The problem is, how to activate it? I tried bumping into it to no avail. Then I looked into a walkthrough - I'm supposed to shoot it with the Oculus' magic missile. But I can't! I can't target the switch (althoug it seems to be "hostile" (red dot on map) when in "non-Oculus"-mode. And I can't fire the MM manually - LMB just does nothing.

I made it past this part - but not the official way. I managed to shoot the glowing switch with a bow and could continue. So there's no urgency in answering the question.

But I leave it still open: Why can't I shoot the damn thing with the Oculus' magic missile as I am supposed to do?