In a large skillet melt butter & saute garlic until brown. Add the pepper & shrimp. Toss gently & saute for 5 minutes over med heat. Remove shrimp & set aside. Pour off butter. Add lemon juice & orange juice to the skillet, stirring in cornstarch until it is dissolved. Heat, stirring constantly, until sauce thickens. Add the shrimp & chives. Heat, stirring gently, for 10 minutes. Serve immediately.