Oscommerce error with Authorize.net

IN PROGRESS
Bids
11
Avg Bid (USD)
$62
Project Budget (USD)
$30 - $100

Project Description:
Having some errors with Authorize.net when a user checks out its works but they get a error message and I get:

Error in encryption

Need this fixed ASAP.

Also would like Who's Online Enhancement Installed
http://www.oscommerce.com/community/contributions,824

Skills required:
PHP, Script Install, Website Design
About the employer:
Verified
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