Bonded Warehouse: Cannot create Customs Declaration

Does anyone have any experience with Bonded Warehouse that they could help with the following?

I have setup Bonded Warehouse in GTS, but am unable to create any Customs Declarations from the PO/Goods Receipt. After creating the PO, Delivery, and Goods Receipt in R/3, I am able to see the corresponding entry in the "Display Customs Declaration/Goods Receipt Quantities" report in GTS, however it does not appear in the "Display Assigned Logistics Documents from Worklist" and I cannot create the Customs Declaration for it.

Does anyone have any ideas that could help with this? Thanks!