Cannot Pick Up String?

[martin]

Hey,

I'm in the old workshop

Spoiler below!

(the room after the bit just after the dog starts chasing you and breaks down the door and you input the code on a door) and I assume that i'm supposed to be able to pick up a piece of string from the box of strings by pressing interact.

However, I'm unable to pick up the string. Pressing interact does nothing. The only thing I can do is right click and have the "odd box of strings" message come up.

Is this normal, or am I just being dense because i've forgotten to pick something up that allows me to get a string?

Thanks.