In A Large Resealable Plastic Bag, Combine The Flour, Salt And Pepper. Add Ribs In Batches And Shake To Coat. In A Large Skillet, Brown Ribs In Butter. Transfer To A 6-Qt. Slow Cooker. In The Same Skillet, Combine The Remaining Ingredients. Cook And Stir Until Mixture Comes To A Boil; Pour Over Ribs. Cover And Cook On Low For 9-10 Hours Or Until Meat Is Tender.