DTW Purchase Orders shows imported but nothing is there

Question

This I have never seen. 
When I import Purchase Orders through the DTW, I am told that everything imported correctly.  When I go into SAP to check, nothing is there.  It seems that nothing was imported.
I was able to import AP Invoices just fine (they were all service type invoices).  The Purchase Orders I'm trying to import are Item type POs.  I have to be missing something but I can't figure it out.  I have included the item and the item description, the warehouse, set the type to "I".  What am I missing?
Please help.  Thanks.

Answer 1

Here is some sample data.  The document contains the following:
RecordKey     CardCode     DocDate       DocDueDate         DocTotal     DocType                    NumAtCard     TaxDate
1                     SFSI001            20070425   20070425         383662.2      dDocument_Items     01766             20070425
2                     CMR001            20070608       20070608         31057.4        dDocument_Items     01788              20070608
3                     RIGI001            20071130       20071130         550926.25     dDocument_Items     01871              20071130
The Document Lines contains the following:
RecordKey     LineNum     AccountCode     ItemCode     ItemDescription   LineTotal     Price     ProjectCode     Quantity     WarehouseCode
1                     0             50200             EA             Each                 383662.2     1.03135     1001             372000     JC
2                     0             50200             LB             LBS                         21681.4     5.38             1004             4030     JC
2                     1             50200             LB             LBS                         9376             5.86             1004             1600     JC
3                     0             50200             SM             Square Meter         503926.2466 24.61     1004             20476.483     JC
3                     1             50200             SM             Square Meter         29000             2.9             1004             10000     JC
3                     2             50200             SM             Square Meter         18000             3.6             1004             5000     JC
There is a mixture of inventory and non-inventory items in my import.