first install latest java then try again. Steps to enable JAVA on IE8.
STEP
1
Click on "Tools" in the menu bar of Internet Explorer to expand the tools menu, then click on "Internet Options."
Step
2
Click on "Advanced" to switch to the advanced options tab.
Step
3
Scroll down until you see "Java (Sun)," and check the box for "enable JRE" as shown in the picture.
Step
4
Click "OK" to save this change, and close the options menu.
Step
5
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