AutoCorrect function does not work in Trados 2017 Freelance

Hello, I've updated to Trados 2017 and the AutoCorrect function simply doesn't work. I have a lot of shortcuts introduced but the system doesn't do anything. I tested it two weeks ago with the 2015 version and it worked OK, but now, nothing on the 2017. Of course, I've habilitated all the boxes for to "change the text while typing" etc.