For any merchant setup, make sure this perl module is installed:
Business::OnlinePayment version 3 or higher
Some of merchants require a special perl module to be installed or an API or interface from the merchant itself.
For StGeorge merchant, they provide their interface API for different Operating SYstems and different programming languages, for details please check their website:
Batch Application 3.1 Note: Due to changes to the batch file format this version is not compatible with files produced to prior version specifications.
Please note: The software will not work without the digital certificate provided by St.George Bank. To obtain the certificate, you need to register with our sales department.