The most common mistake is with the main page of a Web site, also called the index. When you type in your URL or Web page address, the server automatically looks for a file in your main folder called index.html, default.html, or index.htm. Make sure that your main Web page is in one of these formats. If you are not sure which format you are supposed to use, contact your service provider for assistance.
If you did upload a file named index.html (preferably in lower case) to your main folder, and you still do not see this page in your browser, another factor could be causing the problem. Sometimes Internet Service Providers (ISP's) or service administrators create a subfolder called "Public_html" or "web" in your main folder. You can see this directory in CuteFTP Mac's right window when you log into the server. If this is the case, you need to store your Web pages (including index.html) in that subfolder (subdirectory) rather than in the main folder.
To store your Web pages (including index.html) in the Public_html subfolder (subdirectory) rather than in the main folder
Double-click the Public_html folder to display the contents of that folder.
Upload your index.html page again. It should now be stored in the correct folder.
Reload (or refresh) your browser. This should correct the problem.