Pacmanides,

Hey you just rescued this poor baby from a shelter. She will needs time like Michelle said. I work with many rescues all the time. Unfortunately you really don't know thier background. Was this pet a piece of furniture?, was it abused?, you don't know. So now this dog just doesn't want the basics ( it might only had the basics) this dog wants love!!!!!!!!! Yes Females can be a little stubborn but having a happy voice around the dog at all times can help, showing her your unconditional love to make her comfortable and happy. Special treats for no reason, extra play time everyday. Make her feel like part of the family. Want to watch tv? Have her sit with you and give her lots of petting and massaging so she knows "hey this person cares!"

Its real hard to connect to new people if this dog doesn't know what the "pack" is like. So its now your job to give her the pack environment. Special walks, go to a dog park to see how she responds. Just stay focused and resocialize this baby and bring back her happiness. She will respond eventially.
Hope some of this helps, I'm sure you will get many responses and help on this thread.