At a glance, the issue is the files not being uploaded to the appropriate folders. For instance, one image is being looked for here:
http://webdeveloper2832.gomez28.x10.mx/Gallery_images/640/cow-1679716_1920.jpg
That folder does not contain any files named cow-1679716_1920.jpg; this file is actually two full folders higher at
http://webdeveloper2832.gomez28.x10.mx/cow-1679716_1920.jpg. This is the same cause for at least two other images I spot-checked.
Unfortunately this is not something that can be controlled by x10hosting, as you (or your web developer) would need to either correct the paths within the A7 html file, or move the files into the appropriate folder. The service is working as intended, as it will not serve a file from a different folder than the exact path specified (and as a side note, Capital Letters Matter - we run the servers with linux, so make sure all your Capital Letters are correct, or avoid using them entirely to ensure no confusion).