worked in localhost but forbidden from internet browser?

I have installed apache and php into the remote server following the instructions from http://www.php.net (Example2-1. Quick Installation Instructions (Apache Module Version)).
It is worked when I typing "lynx localhost" in.
Next I create a file named "info.php" under dir "/usr/local/apache/htdocs",but when I typing "lynx localhost/info.php" in, it reports
"The requested URL /info.php was not found on this server."
I have no idea about this.

When I am trying to browse from internet,
typing the server's IP in IE, it said:
Forbidden
You don't have permission to access / on this server
But when I type "IP of my server/info.php"
in IE, the content of info.php is shown.

Can anyone give me some advice?
Sorry,my English is poor

[This message has been edited by xiaoguiwxd (edited September 15, 2000).]

[This message has been edited by xiaoguiwxd (edited September 15, 2000).]

the error log reports
[Fri Sep 15 20:20:01 2000] [crit] (98)Address already in use: make_sock: could n
ot bind to port 80
[Sat Sep 16 08:26:56 2000] [crit] (98)Address already in use: make_sock: could n
ot bind to port 80