Min-Max planning

Hi experts

In 12.1.3.

Run Min-Max planning report with parameters as following:

Planning level: Subinventory
Subinventory: HIS
ICategory Set；GSCM Item category
Categories: H-1208402-S
Demand cutoff date: 10-JUL-2014
Restock: No
Net unreserved demand: Yes
Net reserved demand: Yes
Net WIP Demand: Yes
Include PO supply:Yes
Include Move order supply: Yes

Submit the request. View output see that , the demand quantity=0
In OM, there is a sales order for this item , quantity=8 and schedule ship date=20-Dec-2012.

Why this sales order line does not display on the Min-Max planning report as demand quantity?

Thanks
Fengling