The Cowboys keep trying to run the ball with little success. Romo is having trouble hitting plays down the field because he's under constant pressure. Murray is losing yards on a majority of his carries which is putting the offense in a lot of 3rd and long situations.
Even Murray's 48 yard run vs the Giants on opening night would have resulted in a loss had he not made something out of nothing. The offense has no punch because of the struggles on the line.