I second the notion... CALORIES !!
Try loging everything into Fitday.com and see what you come up with. You'll figure it out real quick. I gained 3 lbs my 3rd week into the diet. When everyone else was saying calories don't matter, well, it actually did.
Bottom line to ANY diet in my opinion is CALORIES !!! People who are losing weigh no doubt are eating low calories or exercising like mad. Its that simple.
Pam is right, carbs are sneaky and in everything. But don't give up, it does become easier in time.
So, don't get discouraged, get MAD !!! figure out what is going on and tackle it head on!! you can do it, we're rootin for you !!!
HUGS