Preheat oven to 350F (175C).
In a medium bowl, combine cream cheese, mayonnaise, lemon juice, sherry, curry powder and sugar; stir to blend.
Flake crabmeat; remove cartilage.
Gently fold crabmeat into cream-cheese mixture.
Season with salt and pepper to taste.
Spoon crab mixture into an ovenproof serving dish.
Bake 10 to 15 minutes or until heated through.
Scatter green onion over top.