At Sales Order line, after order booked, you see the line status became "Awaiting Export Screening" and not "Awaiting Shipping". Why?

It is caused by a extra Oracle module that we have integration with, GLOBAL TRADE MANAGEMENT (GTM). GTM will do the screening and feedback to EBS that whether this order line has passed the screening rule. If Yes, order line status will changed to "Awaiting Shipping". If Not, order line status will remained as "Awaiting Export Screening", and as a result, you cannot proceed with Pick Release.