Carlisle won 2-1 at Cambridge to earn their first points of the new Sky Bet League Two season.The visitors got off to a perfect start, taking the lead inside eight minutes when Reggie Lambe swept Hallam Hope's pull-back into the far corner.Richie Bennett had already gone close twice for Carlisle, but Cambridge responded well and were level six minutes after the goal through Medy Elito from the penalty spot. He was fouled by Gary Liddle after Jack Bonham dropped a cross and sent Bonham the wrong way to equalise.Having withstood extended pressure at the other end, Carlisle were ahead again six minutes before the interval. David Forde produced a fine save to turn Tom Miller's header onto the bar but the ball fell to Tom Parkes to fire home from close range.Looking to respond in the second half, Cambridge's best chances came when Luke Berry hit a firm effort narrowly over before Jabo Ibehre thumped a header onto the underside of the bar from Leon Davies' cross seven minutes from time.