Help..I can't get the drill parts

[Ken]

The key is behind the painting in the guest room right?
even though i have picked up that key it still says "look for a key to the machine room"

I saw walkthroughs and there are 3 drill parts in total but in mine two are not appearing.When you pick a drill part in the storage a monster appears in the storage,i saw it in walkthrough but that drill part isn't appearing in my game.
I'll try reinstalling.