Yea I'd say go back to the basics. That means taking her out every two hours and reward reward reward pooping outside. I have a chihuahua that has been a struggle to potty train. He will still pee in his crate if left for long periods of time, but he has officially gone 2 weeks with no accidents in the house. You just have to stick with it. If night time is an issue, I would set an alarm for 1/2 way through the night and make sure she gets a potty break.
She's not "telling" you she has to go because she doesn't have a long enough history of reinforcement for going outside.