Clarke MacArthur scored two goals as the Senators beat the Red Wings 4-2 in Detroit on Saturday night. Ottawa won for the first time in four games, and the Senators have also taken two in a row at Joe Louis Arena for only the second time. They beat the Red Wings 6-1 in Detroit on Oct. 23. ''Coming here is never easy,'' said MacArthur, who scored his fifth and sixth goals of the season. ''You've lost three in a row and you come in here and get a win.'' Chris Neil (fourth) and Bobby Ryan (11th) also netted goals for the Sens.