po20 only loads first 5 lines

I down loaded the PO20.1 upload from http://solutions.lawson.com/lu/addins/main.htm

When I try to use it, it will only load the first five lines of the po and then I get the error message :

Cannot enter vendor item different from existing

This message appears after every five records beyond the first five that worked. What is causing this issue? I'm trying to upload 100 lines to a po. If I change the temp po number after every 5 records it will create a new po. I don't want 20 po's that each have 5 records. Lawson says it's suppose to work.

Any help would be appreciated. We are on version 9 apps/env

Tim