Check your page size and orientation in printer setup before saving the PDF. Even though you are saving a PDF, these settings apply to the results you get.
Thank you very much.
What I think I missed was that all of the print settings on the Win7 PC were correct. However, on the WinXP PC they were set to a previous label page size. I forgot to put a Print Setup script step in to ensure that the same setup would be used on any workstation.
Works fine now, thanks again