Picking stuff up

[PK Starstorm]

Okay, so I finally managed to get the demo of Amnesia to work after a few teething problems, and started playing not too long ago. But I noticed something strange - I'm completely unable to pick up tinderboxes! A bit of confusion set in when I accidentally turned off the crosshair, but even with it on, it made no difference. With the crosshair right on top of the tinderboxes, the little hand refused to come up, so clicking did absolutely nothing. The same with the jar of oil I found.

I can pick up other things; books, helmets, etc, and throw them around to my heart's content. I can also open doors, wardrobes and whatnot, it's literally just the oil/tinderboxes that are giving me trouble. I'm confused .___. - am I just being a moron somehow, or is this a glitch?