Does she have a lot of room in her crate? If her crate is too large then she will potty in it.
Do you watch her when she's outside and see her go potty?
I've had a few accidents with my pup. He's 14 weeks and I try my best to make sure he doesn't hold is bladder longer than 3.5-4 hours at a time.
Sinister "The Prince of Darkness" 4 yr old black male GSD 3.11.09
Draco "Dakota's Unbreakable Vow" 5.5 mth old male Dalmatian 6.30.13
Cats: Chaos, Mayhem, Monster, Wicked