I have created a test account with Authorize.net and am using ActiveMerchant to process credit card payments for a website. What error I always get is Error#*87 - "Transactions of this market type cannot be processed on this system" mentioned in ActiveMerchant documentations. Any suggestions how to resolve this error ? Following is how i created my gateway. I also checked gateway.test? and it returns true.
gateway = ActiveMerchant::Billing::Base.gateway(:authorized_net).new(
:login =>'API Login ID',
:password =>'Transaction Key',
:test => true)