Fix Paypal Error on PrestaShop

IN PROGRESS
Bids
7
Avg Bid (USD)
$37
Project Budget (USD)
$30 - $250

Project Description:
Already have a few lost sales on my PrestaShop which should be accepting paypal payments.
Pretty sure I setup all the parameters as instructed, not sure why payment is not able to go thru!

Please keep bid low, will have future projects for prestashop...

Here's error message:

Error reporting from your PayPalAPI module

A client has encountered a problem with the module PayPalAPI, see the report:

<b>PayPal response:</b><br />TIMESTAMP -> 2011-10-17T16:52:16Z<br
/>L_ERRORCODE0 -> 10002<br />L_SHORTMESSAGE0 -> Security error<br
/>L_LONGMESSAGE0 -> Security header is not valid<br />L_SEVERITYCODE0 ->
Error<br /><b>PayPal returned error</b>

Skills required:
Paypal API, PHP, Prestashop
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Project posted by:
thanksyou United States
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