PPMOD doesn't work, SAP HR v608

Dear All Expert,

I have config PPMOD as below

and I try to posting to cost center 81182110, which will be posted to Salaries - Direct Labour, but what i got was posted to Salaries

I have set this employee to Cost center 81182110 using IT0027 - Cost distribution, No Split WPBP, so just 1 WPBP every month

Here are the configuration of posting salaries

Actually the salaries need to posting in to GL 6010002 but it's look like PPMOD doesn't work at all, it posted to 6010001.

Did anyone know this problem? and how to fix it?