Off the charger does the light work when you press it? If it does check it with a Multimeter or try a different atomizer. If there is no charge, when you put it in the charger, does it blink three times? If not, while in the charger tap the button to kick start the charging. If it doesn't start charging, take it off the charger and try the button again. Sounds strange but this procedure sometimes works.
Look at the charger. Are those contacts clean? The charger might be the problem.