The description of the problem I'm having is EXACTLY as it's described in this posting: Credits callback script not called (error 1383046)
I was going to respond to that specific posting, however, this site says not to do that, so I'm creating a new thread.
My description is exactly as described in this other posters claim, but I don't have a .htaccess file.
I can see that Facebook is calling my callback file (.php) - twice - but, it still gives me an error: "Sorry, but we're having trouble processing your payment. You have not been charged for this transaction. Please try again."
I setup the callback to return this canned response (which looks properly formatted to me) and this doesn't work.
{"content":[{"title":"10000 Game Credits","description":"Credits used for playing the games","price":5,"image_url":"http:\/\/www.egamestudio.com\/fbslot\/Coin.png","product_url":"http:\/\/www.egamestudio.com\/fbslot\/Coin.png","item_id":"newcash","order_id":"1a"}],"method":"payments_get_items"}
A couple questions: 1. Does it matter if you're in sandbox mode or not (I've tried both and it doesn't make a difference, but I'd like it clarified) 2. Do you have to be signed up with TrialPay or something else for this to work and maybe that's causing the issue? 3. Am I missing an oauth token that may be necessary or something along the lines of a security piece missing?
Any suggestions would be great.
Thanks