I have a Xerox Workcentre 7845 which is persistently showing an error: "The toner waste container is not installed correctly" (I believe this is fault code 009-925). The screen sometimes shows "Reposition toner waste container (R5)". I have repositioned the waste container many times, and also changed it for a new one. However the error message still comes up whatever I do. Can anybody help me with this please?