To integrate your AsecureCart to teapplix, perform the following:

1) In AsecureCart, under Setup: type your Teapplix Account Name, find the signature value - Signature value is a user-defined 'password' shared by Teapplix and your Asecurecart.

2) In Teapplix, under Setup => PayPal accounts, find a blank line for PayPal primary Email address, type in the signature value and press the update button.

Orders will be pushed from AsecureCart to your Teapplix Account.
Note that Teapplix is not able to confirm shipping status / tracking numbers back to AsecureCart.