Allocation Table:Unable to delivery

Hi,

I've created an allocation table using allocation table type standard (0001) and successfully generated the follow documents (WA08)for the Allocation table.As result,two documents got generated namely Purchase order(NB) and STO(UB).

Now i'm unable to create a delivery using T.code VL10B. I've provided STO doc.no on the field purchase order in the same transaction and system will show nothing on the screen after i made a click on the execute button.It's just simply display the tab details under that no information found.

Following are the parameters used for Table creation:

Allacation Table type  : 0001

Item category : C (PO via DC)

Article : ZART001

Allocation rule : 001

Thanks & Regards

Vinoth