Hmm, had you already found all clues, by chance? If that's the case then it's normal, it always tells you to go elsewhere because you've already done everything, all that it's left is to make your 'deaductions'.
Even so, I see how it could be confusing, so I might think to improve this part with the next game,
You've got to do something with that mouse... Maybe put it somewhere where it'll be happy..!