My assumption is that the file is not being sent to the website atall.

You can assume all you want, all day long, but it won't get you any further with this problem. Also, you have provided no additional information that helps us discern the nature of your problem at hand. In fact, part of your problem seems to be that you are bad at diagnosing things and identifying steps to move from assumptions to facts. You could of course simply call the administrators of the remote server to provide information.

So, find out exactly what gets sent over the wire. I have already provided you with information how to find that out. If you care, you can tell us about it. But if you don't, we can keep playing "Guess my problem" for years to come.