Quick magento checkout page fix

Quick magento checkout page fix

Closed - This job posting has been filled and work has been completed.

Job Description

Hi.. We are looking for a quick magento fix for our website.

In the checkout page, the moment we click the "place order" button while checking out using paypal payments standard, it throws the following errors and never goes to the paypal website

- "PayPal gateway has rejected request. Security header is not valid (#10002: Security error)."

- "Unable to communicate with the PayPal gateway."

Here is our website:
e d i t i o n s b o o k s (dot) c o m (dot) a u

We also need complete documentation for the task done.

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Skills: paypal