Buy one get one discount different product

Hi All,

Please help me in one scenario, I want to assign buy one item A get one item B free.

I created this via mix and match discount which line 1, for item A that sells full price, set "discount %" to 0 for this line, number of products needed as 1.

And line 2, for item B that sell for free, set "deal price" to 0 for this line, number of products needed as 1. I have run scheduler job 1020 price and discount, but when I try create transaction on POS (item A qty 1 and item B qty 1), there's no discount appear for this transaction.

Please let me know if I am missing anything, I am using Microsoft dynamic AX 2012 R3.

Thanks and Regards,

Arsya