Ok, a little more information here.

I can upload some PDFs but not others. Surely a file to upload is just a file - right?

What does the file upload extension look for in a file? Is it designed to be able to upload PDFs or is just an image upload tool?

Any answers or advice would be appreciated here as I'm getting closer to a deadline that I have to meet. My only other alternative is to buy another upload product, but I dont think that will interface too well with ADDT's insert commands!

Cheers,
Ian