Paypal live ECO not retrieving values
i am testing Paypal ECO.
After using in the sandbox for a few days, I am happy that everything works as it should.
I have put the live API's onto the pages using Paypal ECO
I get into paypal ok,
I am redirected to my site to confirm payment OK.
I can see the token and payerid in the url on the confirm page, but the session variables are not being assigned as there are no values passed back.
It works fine in the sandbox.
Is this something that needs to be set implicitly within paypal ?