Magento

Hello guys

I’m using Magento CE 1.6.1.
I got a problem when adding the same item to the cart again.

When I tried to add the same item to the cart it is showing cart empty message. but the header cart is showing no.of items in the cart.

Please give me any idea where could be the problem.
It very urgent give me any suggestions. Thank you…

The program may be developed in such a way that when you add the same item in the cart only the number of cart count increase and the item name remains the same.