Having difficulties loading your site after you’ve updated web files? The most common reason for this is your web browser’s cache. Clear it, and try previewing your site again.
How do I clear my web browser’s cache?
Each time you access a file through your web browser, the browser caches (stores) it. This way, the files (including any images on the page) do not have to be retrieved from the remote website each time you click the Back or Forward buttons. You should periodically clear the cache to allow your browser to function more efficiently.
Click on your current browser:
Internet Explorer: http://support.microsoft.com/kb/260897#LetMeFixItMyselfAlways