Carbs are a good energy source and either are burned off, or stored as fat. If you eat carbs in the late afternoon hrs and in to the night, Then the carbs are most likely to be stored as fat.
A simple formula that many Super-models follow is to not consume carbs past noon. If you are interested inreading a few good articles about carbs an fats then go here and scroll down to the old school methods of weight loss .
Drink sufficient water, exercise, and not mixing carbs with fats are very good rules to follow. And not eating carbs past noon is even a good add on for these.