It is easy to find books that say dogs won't foul their bed. It is also easy to find questions here about ones that do. I think book writers know better than to start with a pet store, puppy mill, or backyard breeder puppy. Such puppies start out life being forced to live in their filth and being left alone long periods of time. When they go to their home, they continue to foul the crate either out of stress or just not knowing they can stay clean. It is tough breaking the cycle.
The first step is to have a vet clean up any UTI's or loose bowels. A grid as I suggest at
http://www.askmehelpdesk.com/dogs/in...tml#post251809 will keep them up out of urine. Feeding a meat based, concentrated chow makes holding it easier. Making her move around outside can force her to eliminate, giving you a chance to praise her for it. They can't walk and hold it.