Problem with Autherize.net (SIM) & Credit Card info

I'm setting up the Authorize.net (SIM) module. I've set it all up in the testing mode but when I look at my account in the store I don't see anyplace to enter the credit card information. Why is this? Could I have the cURL not setup correctly? Do I need to install a credit card module? If so which one?

SIM doesn't collect cards on your store.

AIM does. AIM is far more reliable too, because it doesn't have to wait for your customer to be returned to the store after first being redirected to some other site for payment.