when I'm right you have a couple of browsers installed: IE7, Chrome and IE9. First try this: open IE7 from windows (not in matlab) and check if GE-plugin is installed. If yes - it should work. Otherwise please deinstall IE7, so that the shell.explorer.2 only find IE9.
when I open a Shell.Explorer.2, an InternetExplorer ver.7 is opened on a Matlab Figure... and that's ok... but I've tried so many times to install the GE Plugin... and with chrome/ie9 and other browser I'm able to see the Earth application (so the GEPlugin is correctly installed), but when I run the Matlab Code, it tell me that i need the Plugin!!!