In a food processor, pulse cheese and butter until well blended. Add flour, sugar, salt, and curry powder, and pulse several times until well mixed. Add the water, and pulse 2 or 3 more times. Turn dough out onto a clean surface; knead with hands until smooth. Gather dough into a ball, divide in half, and shape each half into a 9-inch log. Wrap in plastic and refrigerate at least 2 hours or up to 3 days.