To use WorldPay to accept credit card payments for puchases in my Netfirms Commerce Pro store please follow these steps:

Install WorldPay payment module

1. Download the WorldPay contribution from either:

http://oscommerce.sunsite.dk/contributions/Worldpay%204.0%20version%201.6.zip

or

http://www.oscommerce.com/community/contributions,882/download,3858/mirror,pair

2. Unzip the "Worldpay 4.0 version 1.6.zip" file to a directory on your
computer. Note that there are 2 Language files (one for the Payment Screens and one for the Callback), plus 2 other key program files.

3. Using an FTP client (eg. Filezilla), upload the contents located in the admin folder from the unzipped directory into your Netfirms Commerce Pro catalog directory.

4. Upload the contents located in the catalog folder from the unzipped
 directory into your Netfirms Commerce Pro catalog directory.

5. Add: define('FILENAME_WPCALLBACK', 'wpcallback.php');

to ../catalog/includes/filenames.php. Ensure that this is

placed just above the last line of code "?>".

6. Go to the WorldPay admin screen (http://www.worldpay.com/admin)

7. Enter the name and password given to you from Worldpay

8. In the WorldPay admin screen first enter the Callback URL as follows:

************************************************************************

IMPORTANT: CALLBACK URL MUST BE SET EXACTLY - INCLUDING CASE - to:

If you ARE using SSL for the checkout procedure

https://

If you are NOT using SSL for the checkout procedure

http://

NOTE: THIS IS DIFFERENT TO EARLIER RELEASES OF THIS CONTRIBUTION.

************************************************************************

9. Make these additional changes in the WorldPay Admin if not already set:

Check Callback Enabled? - ie ensure that it is ticked.

Check Use callback response? - ie ensure that it is ticked.

Ensure Callback suspended is unchecked - this automatically selects if

callback fails.

Do not use callback passwords - it is not enabled!

10. Log in to your Netfirms members section at

https://controlpanel.netfirms.com

11. Click the Site Tools tab

12. Click the Commerce Pro Manager link

13. Click Admin link to login to your store's administration area

14. Click Modules

15. Click Payment

16. Configure Credit Card via Secure Credit Card Payment module (WorldPay)

as required by clicking the Install button.

17. Enter your Worldpay ID and the mode (100=test credit card is authorized, 101=test credit card is not authorized and 0=live).

IMPORTANT: Test using mode 100 or 101 first. If you use Pre-Authorization, and wish to use it select True, followed by E to pre-authorize all transactions.