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I think I have everything configured correctly, but when I use encrypted button mode, the PayPal Sandbox will not accept it (generic error message "Message 3005"). This happens whether or not I configure my PayPal Website Payment Preferences to require encrypted buttons.

When I look at the source code of my page, I see that s2Member did, indeed, created what looks like an encrypted button (there is a PKCS#7 encrypted string in a hidden field). I'm crypto-savvy, but not familiar with PayPal's API, so I'm not sure how to diagnose further.

Any recommendations as to how I can get encrypted buttons to work? (Also note that everything works splendidly without encryption.)

UPDATE: Just got word from PayPal that encrypted buttons might not work in the Sandbox... seeking further confirmation from PayPal...

Thanks for the update. I look forward to what PayPal tells you later.

PayPal reports that the sandbox should work just fine with encrypted buttons. I will double-check my configuration to make sure I've got everything in the Sandbox and s2Member configured correctly...

I've triple-checked that my PayPal (Sandbox) and s2Member settings are all OK. When enabling encrypted buttons, paypal fails with a generic "Message 3005" page stating that they are having technical difficulties (which I think is a bogus catch-all when something comes in that it can't deal with).

I have confirmed that when I turn on s2Member encrypted buttons, the page code includes (what would appear to be) a PKCS#7 encrypted string, in place of the plain-text button code.

Encrypted buttons are not accepted by PayPal regardless of the "Block Non-Encrypted Website Payments" setting. PayPal claims the Sandbox should be compatible with encrypted buttons. I have not been able to test this on a live PayPal account (only Sandbox).

Can you test whether encrypted buttons work in Sandbox for you?

I can confirm that Encrypted Buttons work ( i.e. can be tested ) in our Sandbox account. That being said, not all Sandbox accounts are created equal; I've seen some discrepancies from one account to the next. If all else fails, you might try creating a new Sandbox account and see if that helps.

Thanks for the confirmation. I'll quadruple-check everything and even try another Sandbox before going live.

And if all else sandbox fails, you can try small live transactions.

Come to think of it, the failure occurs immediately upon going to PayPal (before you even get a screen showing the terms of the purchase). So, if I switch to a live account, enable encryption, then click the button, I can see if PayPal even accepts the button code. If it does, then I can still decline the subscription (or cancel the subscription if I include a free trial period).

For further discussion on this topic, please see:
viewtopic.php?f=36&t=309&p=28461#p28461