FPMA Clearing Issue

Hi Experts,

I am new to Clearing rules update in FICA, request you pls guide on how to work on the below scenario

I have posted invoice with debit items with relevant contract objects and later i have posted an advance payment document without clearing the open items.(through FPCJ)

Now while i am executing FPMA, system is not considering the advance payment with the open items.

I have assigned the clearing variant, where i have maintained Due date in "Char" and Contract object in "Sort" with rank selection as "3".

So, pls suggest the settings that i need to make further, where the system will consider the advance payment and clear the open item as per the contract object ranking that i have given in "Sort char" and due date.

Note: Presently during FPMA, system is not considering the advance payment that i have collected during the clearing

Thanks

Viswanath