404 not found in module only

Hi I have a problem with many modules , 

When I go in modules like video pictures wall and more than I received a 404 not found

I tried three to time to install and downlaod two time

I don't know if it's a problem with the .htacess or my web server

phpinfo here -> http://panel.lordofkill.com/php.php

I run Ubuntu 10.04.3 LTS and hosted on iweb  I have the full control on this server

Thanks for your help

Make sure of the following:

1. mod_rewrite is loaded; and
2. there is a .htaccess file in the root directory of the installation.

on the server, your sure all the folders have the correct permissions?

you also may have to go to the Admin>Flash Apps and click the pluses on each module and make sure they are installed, especially if this is only happening on media modules.

Nathan, his php info shows it installed

 You may find this old thread helpful in getting Dolphin set up to run on Ubuntu,

http://www.boonex.com/forums/?action=goto&my_flags=1#topic/D7-Ubuntu-9-10.htm

it is the one I used to get my home server running, http://www.duvallocals.info/

the photos are missing from the thread but your server is already running so make sure your have ffmpeg installed correct too.

If it's loaded (and he really does have full control of the server, suggesting it's VPS or dedicated), it might still be the second option.  It's also possible he's using a default Apache configuration, which doesn't allow the use of .htaccess files.  If that's the case, he needs to edit the site configuration file (/etc/apache2/sites-available/default) and change AllowOveride from "None" to "All."

This is fixed thanks to nathan and newthon 

The problem is the apache2 config , It's my first time i need to setup this in a files 

Thanks