You need to make the following changes Shashi:
1) Need to assign right combination of Activity Area and Activity to WOCR determination node in IMG-EWM>Master Data -> WO -> Rule to determine WOCR
2) Ensure right tick for HU creation is maintain in Pack Spec and Pack Profile ( 0BDL is maintained with right master data entries )
3) Ensure that you have assigned a start Bin to Activity Area in: SAP MENU -> Master Data -> Activity Area -> Assign start and end Bin to Activity Area
This will enable you to get create pick HU with WO creation.
Reward if useful !!