Souvent - I am still very anxious to get this module working. I thought I had it licked when I successfully completed a test transaction last week. But this week, I cannot complete a transaction. I am mystified why it worked and now doesn't.

When I click the "Submit order" button, I get this error:
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Review order
We were unable to process your credit card payment. Please verify your card details and try again. If the problem persists, contact us to complete your order.
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I have tried with different credit cards, so it's not a card problem. I tried deactivating the Secure Pages module with no change. I tried completely removing the PayFlow Pro module, then loading up a fresh copy on the server, with no change.

At this point, I have temporarily abandoned this module, even though we are paying monthly fees for our PayFlow Pro account (we use it for other stuff besides the website). Instead, I have fallen back on PayPal Standard, which costs us quite a bit more in transaction fees. But I would really like to get PayFlow Pro working, and any help would be greatly appreciated.