Download the Virtual Merchant Developer guide for this one.
This is one of the few places on the Internet where I could find some information about the Recurring payments of VM. Yet I still cannot find anything about it neither on their (Elavon's, former NOVA) website nor on their Development Guide you refer to. I tried several approaches with no avail:
ssl_transaction_type=recurring
ssl_transaction_type=ccrecurring
ssl_recurring_trans_type=recurring
ssl_billing_cycle=monthly
ssl_number_of_payments
(the last three are taken from their VM User Interface, where one *can* initiate a Recurring Transaction)
But neither of these do the trick.
Could you just provide the right parameters if you have some information available, please? Thank you very much!