TCS Debit Memo on Advance Receipt not Generating

Hi

I have done setups for TCS (New Setup); all the functionality of TCS is working.

1. Able to attach TCS Taxes and create TCS Liability.

2. Able to attach TCS on Advance Receipt.

3. On Applying REceipt wtih Invoice, TCS Credit Note is also generated,

But TCS Debit expected at the time of Advance Receipt is not generated (even in AR Interface); What could be missing.

(I have a doubt on TCS Threshold Setup, is it mandatory to define TCS Cess and attach with threshold. I have defined it only with amount greater than 10L with out giving any Tax Rate or Tax Catgegory.)