Cheesy chicken N Shells

I don't remember where I got this recipe but it's really good.

1 1/2 cup uncooked medium shell pasta
2 Tablespoons flour
1/4 cup water
1 1/4 cups chicken broth
1 can condensed cream of chicken
1/2 cup Velveeta, diced
1/4 teaspoon salt
1/4 teaspoon pepper
1/4 teaspoon poultry seasoning
1/8 teaspoon paprike
1 1/2 cups cooked chicken cubed
3 tablespoons dry bread crumbs
1 tablespoon butter melted

Cook pasta according to package. In a saucepan, combine flour and water until smooth. Gradually stir in broth. Bring to a boil. Cook and stir 2 minutes or until thickened. Reduce heat and add soup, seasonings and cheese. Cook and stir 5 minutes or until cheese is melted. Drain pasta and place in a bowl. Stir in soup mixture and chicken. Transfer to a greased baking dish. Toss bread crumbs and butter, sprinkle over top. Bake uncovered at 350 for 30 minutes or until golden brown. Makes 2-4 servings.