Sorry - the credit card information is never received or stored on your site esp when using the SIM module to have all the data collected on the authorize.net site.
You might convince the authorize.net staff to process those test transactions as "real", but I doubt they'll be willing to do that.
You'll likely have to contact your customers in order to collect payment.
(One good reason to make a note to always test real transactions with real credit cards before going "live")




