I am trying to enable the "Allow create new accounts" feature for the 1ShoppingCart plugin. If I understand the feature correctly, the user can pay first w/ 1SC and then 1SC will communicate with aMember to set up the user's account. I cannot figure out how to make this work. First, as a baseline, I set up everything so that aMember and 1SC communicate correctly when the user sets up their aMember account prior to paying. So when the user goes to signup.php and proceeds through the order normally, everything works fine. Then I enabled the API settings in both aMember and 1SC according the the instructions. However, I don't know what to do next (simply because nothing I try seems to work). I assume that I would provide the user with the standard "Add to Cart" link provided by the 1SC product. However, when the user clicks on that link, the user sees an empty cart (i.e., the product is never added to the cart). So I tried (by chance) disabling the "aMember Integration" for the product I'm trying to add. And when I do that, the products shows up in the cart when the link is clicked; however, after purchase is complete, there is this series of 3 (error) messages in the aMember log: Apparently by these messages, aMember is expecting information back from 1SC that will enable it to connect this paid order to one it knows is already in progress. But how can it know of an order in progress? I'm skipping signup.php. Is there something special I'm supposed to send to 1SC in the add-to-cart link so that it knows how to communicate back to aMember? I'm really confused and stuck. I've not been able to find any documentation on how to actually USE this feature. There's documentation on how to set it up, but not on how to use it. I would greatly appreciate any help. Thank you!