Recently I needed to install IE Developer Toolbar to get some values of some applications. But after the installation I found out that it is not displaying any information about the loaded site.
Later I got to know that IE Developer Toolbar is not working if Internet Explorer Enhanced Security Configuration is installed.
So if you are also facing the same problem go to Add / Remove Programs and open up the Windows Components wizard and uncheck Internet Explorer Enhanced Security Configuration to remove it and when the wizard is finished and after you have restarted the Internet Explorer the IE Developer Toolbar will function as usual.
Arjuna's space 