The download process is very simple. The HTTP component sends a "GET" file request to your server. But your server does not respond to this file request (when you see a "source file not found" error). There is absolutely nothing from the SetupBuilder side-of-view that can be done to work around it.

To make it even worse (for us) is that it ALWAYS works when we install from your server (5000+ miles away). So what options do we have to solve this?

Friedrich