If you have uploaded your ".swf" file, pasted the HTML into your web page, and the reference to your ".swf" file is correct, you have done everything you need to. The reference in your HTML must match the exact location and spelling (upper/lower case) of your ".swf" file. If it doesn't it won't find it. Also make sure the reference doesn't include a reference to your hard drive (D:/), which is a common error.
When you then view your site, make sure you force a couple of browser refreshes (F5 or Ctrl-R). This will force your browser to refresh it's cache with updated data and information from your site.
There are other possible thing that could be wrong, but you haven't provided us with a URL to your site, so we can't take a look.