No charging =(

Hi maclovers

I have a macbook air and a "L" charger all original.

Suddenly the charger has stop showing the light (green or red).

At the battery symbol you can see that the charger is connected but it doesn't charge. It only keeps/holds/maintains the battery level I have.

It works sometimes very rarely.

Do any one know this problem?

I have tried different electrical outlets but no chang...

Thanks!