HEAT oven to 375°F.
WHISK dressing and flour in medium saucepan until blended. Gradually stir in milk. Bring to boil on medium heat, stirring constantly; cook and stir until thickened. Add 1 cup cheese; cook until melted, stirring constantly. Reserve 1 cup sauce.
STIR chicken, salsa and parsley into remaining sauce; spoon 1/3 cup down center of each tortilla. Roll up. Place 8 roll-ups, seam-sides down, in each of 2 (13x9-inch) baking dishes sprayed with cooking spray; top with reserved sauce and remaining cheese.
BAKE 25 min. or until heated through.