ATP Rules in OM - No future supply

 Hi, does anyone know how to create an ATP rule that prevents an item from being scheduled on a sales order line? I cannot deactivate the item as we still have open orders that we need to honour, but any new orders that are placed for this item, I need to prevent the item from scheduling. Any ideas?

Have alredy tried the following setup:

- User define time fence = 100,000

-Demand Sources;  Sales Odrers and Internal Orders checked

- Supply Sources; User defined, Internal Reqs, Purchase Orders, On-hand Available and Interorg Transfers checked.

Standard collections has been run and whne I place the item on a line and schedule, it schedules the line to 154 days.