Bizarre error whilst trying to print

Can anyone help please.....

I've been using CorelDraw Essensials x5 for about 3 years now and suddenly out of the blue an error has started occuring.....

I have my page ready to print.... everything looks fine... i press print..... then suddenly random shapes appear on my page on screen, like some ghosts of previous shapes from over the years haunting the program. These shapes spoil the print outcome, as soon as i zoom in or out or select anything they vanish but it's too late, they've already spoilt the print out every time. And it's always different shapes and lines that randomly appear????

D.