make to order stock delivery issue

hi sap guys

i m creating delivery for make to order stock, when after creating order i try to do vl01n it gives error that * No deliveryrelated items ,no shedule lines due for given date

and in sales order when i check shedule line it shows confirm quanty 0 .

so plse help- wht could be the reason for this

is there any settings or different item category

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