Create a simple .html file and put it in your htdocs folder. Then try to open it with your browser. If you can't, then you have the wrong setting in your httpd.conf file.
Make sure these lines exist and are correct:
DocumentRoot
<Directory "same as DocumentRoot path">
ServerName yourserver.com or 123.123.123.123 (your ip)
ServerRoot "path/to/server"
Other than that, I'm not sure... you might want to ask this question in the Install forum, or even better, ask the moderator of this forum, daynah, to move it over there for you.