paypal Error

[mukky]

Hi

When i make the paymenti get the following error

 

Authorisation to PayPal failed

Please refer to logs:

1. PayPal response:
   
2. TIMESTAMP -> 2012-08-24T14:07:41Z
   
3. L_ERRORCODE0 -> 10002
   
4. L_SHORTMESSAGE0 -> Security error
   
5. L_LONGMESSAGE0 -> Security header is not valid
   
6. L_SEVERITYCODE0 -> Error
   
7. PayPal returned error
   

this is the url for my store

http://www.blitzkriegwebtech.com/prestashop

 

Please let m know at the earliest

 

Thank & regards

Mukund