Affiliate Marketing Secrets

So i downloaded the city of secrets game on my mac, and im in episode 4, and Moles just found where the public toilet was and opened the passage in the statue, and he told Rex about it, however now i dont know what to do. He wont go into the passage, and there are no hints that they are giving me. I checked everywhere on the map, (roof, dump, prision, mayors place, farm, market, tank bottom, etc.) and i talked to everyone and clicked on everything and nothing has come up.
So what do i do?
thanks