The name of the folders depends on your HTML code, therefore you have to look into the source code (if you use Firefox as Webbrowser, type CTRL+U and a new window with the source code is opened).

If you see a reference like <img src="test_folder/testfile.jpg">, you have to upload the image with the name "testfile.jpg" in the folder "test_folder" under your "public_html" folder (the names are only examples, you have to search for the right names in your generated HTML file).

Remi