script error in chapter 6 - haunted dams

[z383r]

Help! My game has a problem with the script. In a 6-step "Mole Underground" is the moment when we follow the second time Moss, we have a moment of it down and press a button that has to make that we will extend a bridge. The problem is that this button does not work, I watched the gameplay on Youtube and there was no trouble. What can I do to make this script began to work as it should?