We are using Magento 1.9 and wanted to add PayPal express checkout. The buttons are already on the product detail page or in the cart.
My problem:1. When i click the button on a product page it just adds the product to the cart instead of redirecting to paypal account.
2. When I click the button on the cart page, then i get an error. I google the error and it says that that usually happens when the API details are wrong but I'm 100% sure that they are correct.
I would appreciate your help. Thanks in advance.