Add to cart bottom has disappeared

Hi,
I do not know why I died on the button "add to cart".
I'm facedno a copy of setting my trolley extension to another .. I reinserted: paypa, wire transfer, shipping, etc. .. I just died on the button.
What could have happened?
Bye

Hi,

You must have turned off the "display add to cart button" option of the Display tab of the configuration.

I can not find!!!!

Unbelievable but true, I can not find the item displays add to cart button!
I analyzed all the items!

Solved!