The requested URL was not found on this server

I have aYii1 project i recently moved to a new server but can’t get the pages to work properly. My directory structure looks something like this

	backend/www/.htaccess
	common/
		components/
		config/
			params.php
			params-local.php *
		lib/
		migrations/
		models/
			Comment.php
			Extension.php
			...
	console/
		commands/
			SitemapCommand.php
			...
		config/
			main.php
			main-local.php
			params.php
			params-local.php
		runtime/
	frontend/
		components/
		config/
			main.php
			main-local.php
			params.php
			params-local.php
		controllers/
			SiteController.php
			...
		lib/
		models/	
			ContactForm.php
			SearchForm.php		
		runtime/
		views/
	    www/ .htaccess
	yiic
	yiic.bat
       .htaccess

in the main .htaccess i have this

Options +FollowSymlinks
RewriteEngine On

# deal with admin first
RewriteCond %{REQUEST_URI} ^/(admin)
RewriteRule ^admin/assets/(.*)$ backend/www/assets/$1 [L]
RewriteRule ^admin/css/(.*)$ backend/www/css/$1 [L]

RewriteCond %{REQUEST_URI} !^/backend/www/(assets|css)/ 
RewriteCond %{REQUEST_URI} ^/(admin)
RewriteRule ^.*$ backend/www/index.php [L]


RewriteCond %{REQUEST_URI} ^/(assets|css)
RewriteRule ^assets/(.*)$ frontend/www/assets/$1 [L]
RewriteRule ^css/(.*)$ frontend/www/css/$1 [L]
RewriteRule ^js/(.*)$ frontend/www/js/$1 [L] 
RewriteRule ^images/(.*)$ frontend/www/images/$1 [L]

RewriteCond %{REQUEST_URI} !^/(frontend|backend)/www/(assets|css)/
RewriteCond %{REQUEST_URI} !index.php
RewriteCond %{REQUEST_FILENAME} !-f [OR]
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule ^.*$ frontend/www/index.php

in my frontend/www/.htaccess, i have this

RewriteEngine On 
RewriteCond %{REQUEST_FILENAME} !-f 
RewriteCond %{REQUEST_FILENAME} !-d 
RewriteRule ^(.*)$ /index.php?/$1 [L]

http://blabla.com/ works, but when i go to http://blabla.com/about/ i get The requested URL was not found on this server.

It works fine on my localhost (using MAMP on windows), but not on my web server (UBUNTU)
Any idea how to fix this? Thanks

Try removing the question mark.