Service Tax amount not picking during MIRO

Hi,

We create a PO number 1234567890, in which we insert Tax Code for VAT 10% and also used condition type of Service Tax on Basic Price (BP) ZABC - 10.3%...like..

Basic Amount - 10000.00

VAT Amount on BP - 1000.00

Service Tax Amt. on BP - 1030.00

-

Total PO Amount - 12030.00

-

During PO, total amount is showing 12030.00 and in MIGO showing like..

12030.00

11000.00

1030.00

which is correct...

But during MIRO, amount is showing only 11000.00... Service Tax amount 1030.00 not picking in MIRO..

What should be issue there....please comment...