Jericho. I use and like WS-FTP. You can download it from HERE.
You did not give the URL of the page you uploaded so I can't be certain what your problem is. The usual thing that goes wrong is confusion between absolute and relative links to images etc. I have lost count of the number of times it has happened to me!
It works in the preview window, but does it work if you point your usual browser to the page on your hard drive? Sometimes the preview is not what a normal browser sees.
Another possibility is the image format, but if it works on your machine that is less likely.
If you post your URL we can have a look and see for certain what is happening.