First you need to exclude other options that might cause this problem.

1.       Are the indexes showing in Firefox ?

2.       Are the indexes showing on other computers?

3.       Have I used the cache cleaner?

4.       Does this only happen when I use IE?

When you have concluded that the issue at hand ONLY happens on ONE computer when using IE, then the solution maybe that you have to reset your   Internet  Explorer settings to the default settings.

You can do this by going to TOOLS—INTERNET  OPTIONS—ADVANCED—and click on RESET Explorer settings.

The article below describes which settings will be reset and which settings stay the same:

http://windowshelp.microsoft.com/windows/en-us/help/81fe3b46-2460-459e-b826-8f134a7fe1771033.mspx