Mix sugar and flour in saucepan. Add water. Stir. Add next 5 ingredients. Heat and stir until boiling and thickened.
Layer ribs in 5 quart slow cooker, spooning sauce over each layer. Cover. Cook on low for 10-12 hours or on high for 5 to 6 hours, until ribs are very tender. Enjoy!
Source: A friend passed it on to me and it's become a family favorite - especially with the boys!