Discount on AP Invoice

Hi

We have an AP invoice with payment terms as 1% 10 NET 30( 1% discount if we pay in 10 days otherwise due in 30 days). Another invoice is with payment terms as NET 30.

When we raise a payment batch today we want to include the first invoice in the batch where as second invoice should not get picked up eventhough both invoices have due date after 30 days.

I have supplier setup such that Paydate basis is as Discount. But it is not working.

Please help me how to achieve this?

Regards

Srini