ST Paid to Sub Contractor

Dear Sir

I am a Contractor and I am Service Tax Collect from my Contractor and at same time i was Service Tax Paid to my Sub Contractor at Service Tax Paid Time I will Cen Vat Credit Taken on Payment to my Sub Contractor.

Exmp. I was Collect ST From my Contractor 10

and I am Paid ST to my Sub Contractor            5

Then i will paid ST only                                         5 is this correct or not

and Cen Vat Credit taken only i was Amount paid to My Sub Contractor or Bill Received my Subcontractor Plase Tell

Thanks