I am having this same problem Security Header Invalid
I've checked and re-checked my credentials and dont' get what's wrong.
The steps I took were
download it, move it to my server
change to live in the config.inc.php on line 57
change to my credentials in examples.php on lines 145,147,149
Am I missing something?
Thanks in advance!
2009-02-13 00:14:00 UTC in Website Payments Pro 4 Paypal
