Sometimes weight loss is stopped (or never started) due to a number of reasons. Your period is a major concern when it comes to this. Also, are you eating the recommended amount of veggies? I've noticed that the irregurality that comes with Atkins also tends to slow weight loss (try a sugar-free fiber supplement like Metamucil). Are you drink enough water? This is a major key to Induction.
As far as the strips go, my mom lost 20 pounds on Atkins and never once went into "Ketosis", so don't get too bent out of shape about them.
I know it is frustrating, but keep with it. You'll get over that mark with time. Good luck!
Keep it up!