Oracle Database Express Edition (XE)

I installed the pakage oracle-xe-univ-10.2.0.1-1.0.i386.rpm in my Linux Fodora 5, I will describe the steps I followed:

1) Installed the pakage

root@willy ~]# rpm -ivh oracle-xe-univ-10.2.0.1-1.0.i386.rpm
Preparing... ########################################### [100%]
1:oracle-xe-univ ########################################### [100%]
Executing Post-install steps...

You must run '/etc/init.d/oracle-xe configure' as the root user to
configure the database.

2)
[root@willy ~]# /etc/init.d/oracle-xe configure

Oracle Database 10g Express Edition Configuration
-------------------------------------------------
This will configure on-boot properties of Oracle Database 10g Express
Edition. The following questions will determine whether the database should
be starting upon system boot, the ports it will use, and the passwords that
will be used for database accounts. Press <Enter> to accept the defaults.
Ctrl-C will abort.

Specify the HTTP port that will be used for Oracle Application Express [8080]:80

Specify a port that will be used for the database listener [1521]:1521

Specify a password to be used for database accounts. Note that the same
password will be used for SYS and SYSTEM. Oracle recommends the use of
different passwords for each database account. This can be done after
initial configuration:
Confirm the password:

Do you want Oracle Database 10g Express Edition to be started on boot (y/n) [y]: n

Starting Oracle Net Listener...Done
Configuring Database...Done
Starting Oracle Database 10g Express Edition Instance...Done
Installation Completed Successfully.
To access the Database Home Page go to "http://127.0.0.1:80/apex"

3) I checked the connection with the database

SQL*Plus: Release 10.2.0.1.0 - Production on Dom Jun 11 21:43:13 2006

Copyright (c) 1982, 2005, Oracle. All rights reserved.

SQL> connect system/guillermo
Conectado.
SQL>

4) I check the Apache Service

-------------------------------------------
[root@willy ~]# nmap willy

Starting Nmap 4.03 ( http://www.insecure.org/nmap/ ) at 2006-06-11 21:46 ART
Interesting ports on localhost.localdomain (127.0.0.1):
(The 1665 ports scanned but not shown below are in state: closed)
PORT STATE SERVICE
22/tcp open ssh
25/tcp open smtp
80/tcp open http
111/tcp open rpcbind
443/tcp open https
631/tcp open ipp
1521/tcp open oracle
50000/tcp open iiimsf
50002/tcp open iiimsf

5) I went to http://localhost/apex and got the following message

Not Found

The requested URL /apex was not found on this server.
Apache/2.2.0 (Fedora) Server at 127.0.0.1 Port 80

I don't understand what the problem is. I installed oracle-xe and I can't access the Database Home Page. Do I need to install some other program or do something else?

Thank you very much in advance