Thanks to Pesenda, Chris26 and Kirkt. I have found that the image as in MS Photo prints out much the same as the same image in AP even though the on screen image in AP has a distinct yellow caste. By experimenting I find I cannot make a white fill layer, it is yellow. I thought it might be the New Document set up that is causing the problem but I am using the profile suggested in Leigh's FAQ.I don't think altering the display settings would solve it as that would alter the image in both apps.
Thanks anyway but I would like to know why I can't make a white fill layer.