The performed gesture does not work as expected. In this instance please view the gesture log, as selected from the Menu Bar item, to see what gesture is being calculated by the gesture engine.
If the correct gesture is shown and it is consistent with the gesture being performed then ensure your usage of the gesture is correct for the application or desktop function.
If the log shows that the gesture is inconsistent in its generation see if any gesture or driver setting in the driver is causing the issue.