Accounts Payable AAI

I created a new document type for vouchers so the company can track specific vouchers (CV) istead of the default PV.  However, after setting up the new document type in the UDC tables 00/DT and 00/DT when using the voucher entry screen and saving the transaction for this document type, there is no automatic entry created to put this expense to the liablility account.  I thought the AAI's were driven through the application, but now I'm beginning to think it is doc type specific (PV).  How can I add another doc type to run like PV in the AAI's ??