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Paypal Transactions fail with Client API's

Thread began 6/21/2010 9:01 pm by sharada408278 | Last modified 6/23/2010 11:46 am by sharada408278 | 890 views | 5 replies

Jason ByrnesWebAssist

yes, the error "Security header is not valid" means that the API credentials being used are not being excepted.

for express checkout, there are 3 server behaviors that need to be changed:
On the checkout.php page:
1)"Authentication For PayPal Express checkout"

On the pp_confirm.php page
2) "Get Payer Profile from PayPal Express Checkout"

3) "Process Transaction with PayPal Express checkout"


all 3 of these must be changed to use the Live API credentials, and in all three, you need to turn the sandbox off.

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