API not pulling the file thru a filehost

Hi,

I'm using Rejetto's HFS to allow HTTP connection of my hosted file.

Got my API key, the demo file works, but when I change the URL to mine, I get an error "can't preview"

If I enter that URL directly in Chrome, work as expected, the PDF file download.

When the API run, I get a log entry for a request of the file in HFS, but the file never get send (no output)

Any idea why ?

Thanks,