Lostmountainlabs is correct, you have to especially make sure the puppy gets out after eating. With my breed, we find that the pooping starts about 15 to 20 minutes after puppies eat; the older they get, the longer that time becomes. I really don't think you can expect too much yet from an 8 week old pup. I would also say, generally speaking, there is nothing wrong with a puppy that poops in its crate. I mean, when you have to, you have to, right? Its really a matter of getting the puppy out often enough and figuring out what their schedule is. Also, are you letting her out during the night? If not, you may want to think about getting up at least once in the middle of the night.

We always tell our puppy buyers that if your puppy has an accident, it's not the puppies fault. That's generalizing a bit, but it's to drive home the point that you need to watch the puppy closely and take it out often. When we take a puppy outside to do it's business, we use the words "Get busy". They don't get any attention til they do their thing; when they do, they get LOTS of praise.

BTW, there is a book titled "How to Housebreak Your Dog in 7 Days" by Shirlie Kalstone that I think is excellent. I think the last time I bought a copy on Amazon, I go a used copy for something like $5.

Good luck with your new puppy!