Redirected to checkout page from paypal confirm page

[Guest]

Hi, I am in the process of setting up the paypal payment module, I have entered all the relevant API info for paypal express checkout, i get the paypal button on the cart page, when i click on it i get directed to paypal login, I login then when i click on the confirm card button (the page before you confirm transaction amount etc.) I just get redirected back to the checkout page on oscommerce? any ideas?

 

thanks

[Guest]

just to add, when you are returned to oscommerce the error bar is asking "Please select a payment method for your order."