Sorry, when I enter the URL I get the security warning and then the sign-on box pops up.  I enter the UID: admin and the correct PW it then waits a couple of seconds and the sign-on box reappears without error essages.  The same happens on my laptop with IE 6, but I can access from my iPAQ.  I believe that so setting in IE 6 under Tools -> Internet options -> Connections is preventing this connection but I am not sure which.  Hope this helps.
TIA  Wildkow