Srivinas is trying to point out that the drawings on your layout are derived directly from views. So if your layout is not showing correctly, it is logical to asume that the problem lies with your views. This is different than your viewpoint, in that it has a model view option combination applied to it, which dictates whether your window and door labels appear.
To be doubly sure, and help us users from the other side of the world who are volunteering their time to help you, maybe you could do one more check? Try selecting the drawing on your layout, then right clicking and selecting 'Open source View' from the context menu. Does the view indeed still have the labels showing? If so, we'll take it from there. If not, you'll need to redefine your view to include an MVOC that has the window/door labels showing.
Cheers,
Link.