[SOLVED] Paypal API error 10002 - security error/security header is not valid

[marronne]

After much searching and reader of forums far and wide I have solve my particular issue and the recurring error on clicking the "pay with paypal" button in my shop. I took the advice of many to enable the shop and make sure it wasn't in test or sandbox mode (in the paypal module settings). This on its own didn't seem to do anything - I even enabled my SSL certificate but that didn't do the trick.

For me the key to solving the problem was in removing the old API signature details in my paypal account and requesting new ones which I then pasted into the PS paypal module settings, enabled my shop and whahey !!!

Hope this helps someone out there.