Forest Green remain rooted to the bottom of Sky Bet League Two after Carlisle continued their impressive form on the road with a 1-0 win at The New Lawn.Richie Bennett's 28th-minute header earned Keith Curle's side the points as Rovers fell to their third consecutive league defeat.Earlier, poor Forest Green defending allowed Hallam Hope an opportunity to give the visitors the lead, but his shot from inside the box clipped the top of the bar.Carlisle found their range and nosed ahead when Danny Grainger's deep free-kick picked out Bennett, who planted a sumptuous header beyond Brad Collins.Hope came close to making it two, but faded his shot wide of the bottom corner.Scott Laird then presented the ball to Reggie Lambe for Bennett to take aim, but only a spectacular clearance off the line from Jack Fitzwater denied Carlisle a 42nd-minute second.Rovers' Jordan Stevens, Mark Roberts and Laird picked up bookings after the break along with Carlisle captain Grainger and Tom Miller in a second half devoid of scoring opportunities.