sales order number not appeared

Hi Friends,

We are using strategy 40.When i was created sales order for that material system is not showing sales order number in md04 under MRP elememnt data.I have done all settings ie availability checking group and startegy group.

When i was created sales order for same materila by using the strategy 20 system showing sales order number in md04.

Please tell me where can i miss the settings.

Thanks

Venkat