Thanks for the URL.
I see that it expects to find the image files in the /files/ directory:
Are you sure that the files are in that directory, /files/?
Please post a screenshot of the /files/ directory from FileZilla showing the graphics files in it and their permissions. Thanks!
Images on your other pages seem to be in the correct subdirectories, e.g. http://www.ericclapton.it/styled-2/files/20170522_sgp_eric_clapton_rah-001.jpg
Is it possible that you have %Resources% incorrectly configured in RapidWeaver?
Which version are you using?
Then, did you make changes in RapidWeaver’s Publish Settings so that perhaps the docroot is not where your server expects - that is often ‘www’ or ‘public_html’ etc?
These pages may help:
Otherwise you might want to consider contacting your host - it seems as though there may be some special operations happening by IIS.
The links from this page are broken. But FTP settings might help.