Your web browser has a storage facility on your hard drive that stores graphics and text from web sites that you visit. This storage facility is called the cache, or Temporary Internet files. The reason web browsers have a cache is that it is quicker and easier to load images, applets, etc. from cache on your hard drive than downloading them again. Over time, your browser's cache gets full and the information gets outdated. This can cause problems with Java applets and can result in that Applets are freezing or not working at all. The solution to this is to clear cache and reload the page. If this does not work, try clearing your cache, closing your browser and then revisiting the page.
Internet Explorer 4.x or greater
1. Select Tools (or View if you are using IE 4.x), then click Internet Options.
2. Select the General Tab.
3. Click on the Delete Files button to clear the cache.
4. Remember to select the "delete all offline content" checkbox.
Netscape 4.x or greater
1. Select Edit, then click Preferences.
2. Select Advanced, then click Cache.
3. Click on Clear Memory Cache and Clear Disk Cache buttons to clear the cache.