Apache: How to solve "The requested URL /.../..../ was not found on this server."

Question

I am working on a Ubuntu 10.04 server, on which I installed PHP 5.3, Apache 2 2.2.9. I followed the below steps to do the installation :

1. I installed apache2 using SUDO APT-GET INSTALL APACHE2

2. I also installed libapache2 and php using the below commands
   sudo apt-get install php5 libapache2-mod-php5
   sudo apt-get install php5-core

3. I did redirection to port by configuring the DEFAULT file in /ETC/APACHE2/SITES-AVAILABLE. Redirection happened successfully.

4. PHP5-curl was installed using
   SUDO APT-GET INSTALL PHP5-CURL

5. Rewrite mod was enabled in apache2 using
   SUDO A2ENMOD REWRITE and apache2 was restarted.

Now, after following this if I try to access the URL, I get the following message -

 THE REQUESTED URL /.../..../ WAS NOT FOUND ON THIS SERVER.  

But, the same URL is accessed from another system with the same configuration , it works fine.

Answer 1

1) To enable communication's effectiveness, please post full /ETC/APACHE2/SITES-AVAILABLE/DEFAULT 's contents.
2) Please be sure to have done "SUDO E2ENSITE DEFAULT" after initially eventually having disabled it.