Have a problem with the focusing on my E510

Have a problem with the focusing on my E510 (whichever lense I use). The diopter is set correctly. When focusing in AF through the viewfinder, the autfocus red light lights up and beeps when it says it is focused and even looks focused through the viewfinder, byut when reviewing the image it is well out of focus, as if the autofocus is focusing at least 3feet behind the subject. When put in manual focus using the viewfinder the final image is still out of focus, however when manual focusing using the LCD screen the review image seems fine. Whats happening? Anyone help?