In a sauce pan mix sugar and flour

Stir in water, vinegar, soy sauce, ketchup, garlic, and ginger

Bring to boil and stir for 2 minutes or until sauce thickens

Chop ribs into 1-2 inch chunks and place in slow cooker

Pour sauce over ribs and cook on high for 4-5 hours or on low for 6-8 hours