I just installed WAMP through wampserver and am running it together with IIS on Windows 2008. When trying to open phpadmin, I get the above browser error.
Edit: the problem seems to be with Windows 2008. I can't connect to 127.0.0.1 at all. I've tried disabling ipv6 and disabling the firewall (just to test) and neither of those worked.
localhost is totally inaccessible to me.