STO partial delivery proposal

Hi Experts

In Intercompany STO:

How to enable to delivery proposal while run VL10B ? for partial delivery or complete delivery.

SPRO --> Material Management --> Purchasing --> Purchase Order --> Set up Stock Transport Order --> Assign Delivery Type and checking Rule: Avilablity Check Rule: C (Delivery proposal) & Checking Rule: B SD Delivery

As above, I have choosen the C Delivery proposal option in config on above path.. However there is no any delivery proposal is being shown to select...

1) Also when there is no stock can i able to control from creating delivery order while VL10B ?

2) Can i make throw error as no stock or what so ever.. ?.

Rgds

RG