I am trying to disable participants from clicking on the screen to progress trials, and limit them to using the number keys. Right now, I have the coding set up as "rt:num,41" (the keys on our lab's keyboard have been re-labelled so that the ` key is 0), however when we run the program, it is still possible to advance the screen by simply clicking on the image that is presented. Can someone tell me what I'm doing wrong?