It0080 - maternity leave is not deducted

Hi, SAP experts

i had entered data for IT0080 with expected delivery date, absence type.

And it did defaulted in my list of absences in IT2001 with absence days 65 ,

however, although i've generated quota for my maternity leave for her maternity period and define a deduction rule,

but it doesnt deduct any quotas.

I've checked my deduction rules and i did assigned it to my counting rules already.

However, my deduction interval i've put :

Deduction from : Start of validity interval

Deduction to : End of validity interval (No deduction after datetype : end of mat.prote (i've defined the end date of my IT0080 as the date).

Is there anything wrong? or where should i check this problem?

Regards,

HongLing