Zero Confirmed Quantity / No Schedule lines due for delivery

Dear All

I know this issue already been discussed hundred times and I searched the forum via Google but still the issue is not solved.

My Scenario :

1) Sales Quotation

2) Sales Order (three line items) 10 , 20 , 30

--  item 10 and item 20 already confirmed but the item 30 has zero confirmed quantity, we had some open orders for affected material which is cleared via VA02

-- We have stock in MMBE & CO09 and there is no document left in MD04.

-- Please advise since this issue is very critical and important.

your valuable comments will be appreciated.

Thanks

Fahad