apache running but no response

Hi together,

today i'm installed the new Apache2 webserver on my Windows XP SP1 platform.
All OK, the server runs as a service under windows, but if I try to visit
the local serverpage at the adress http://127.0.0.1 or localhost,
i get the IE standard error site, the the page can not be found.

I don't know what the hell this problem is.
First i take a look into the windows file "hosts" - result: the IP and
servername are registered.
Next i take a look to the httpd.conf - result: all ok
Last i try to ping the server under the DOS promt. the server ansers with no
package lost.
All OK, Firewall Disabled
All Windows update installed
The service is runing

I have no idea, what the problem can be.
Is there anyone who can help me to fix this problem? I need your help,

Thanks in front for all
Bye
Olli