first install latest java then try again. Steps to enable JAVA on IE8.
Click on "Tools" in the menu bar of Internet Explorer to expand the tools menu, then click on "Internet Options."
Click on "Advanced" to switch to the advanced options tab.
Scroll down until you see "Java (Sun)," and check the box for "enable JRE" as shown in the picture.
Click "OK" to save this change, and close the options menu.
Restart your browser for the changes to take effect.
If this doesn't work uninstall the previous IE clean your registry and install IE8. :D :D