Symfony 2.3生产模式网址无法解析

I have just gone through the Symblog tutorials on http://tutorial.symblog.co.uk/docs/customising-the-view-more-with-twig.html

In prod mode, if i access the url like so:

http://local.mysite.co.uk

I get the home page with links to all the blog posts.

However if i click one of the blog posts then I get a 404, in fact any of the links (to the about or contact) all return a 404, eg:

http://local.mysite.co.uk/12/a-day-with-symfony2

If I then access the prod mode via the app_dev.php all the links work again, ie:

http://local.mysite.co.uk/app.php/12/a-day-with-symfony2

I have run to ensure the mod rewrites should be working and restarted apache but no joy.

sudo a2enmod actions

Does anyone know why this might be happening?

Thanks, John

PS: This is the current vhost file for the dev site i am learning with (Ubuntu lts, apache 2.4, php 5.4ish)

<virtualhost *:80>

  # Admin email, Server Name (domain name) and any aliases
  ServerAdmin webmaster@domain.com
  ServerName  mysite.co.uk
  ServerAlias www.mysite.co.uk
  ServerAlias local.mysite.co.uk

  # Index file and Document Root (where the public files are located)
  DirectoryIndex app.php
  DocumentRoot /var/webroot/www/vhosts/mysite.co.uk/htdocs/Symfony/web/

  # Custom log file locations
  LogLevel warn
  ErrorLog  /var/webroot/www/vhosts/mysite.co.uk/log/error.log
  CustomLog /var/webroot/www/vhosts/mysite.co.uk/log/access.log combined

</virtualhost>

When I add an AllowOverride All to the vhost file and restart apache I get the follwoing error:

 * Starting web server apache2
 * 
 * The apache2 configtest failed.
Output of config test was:
AH00526: Syntax error on line 15 of /etc/apache2/sites-enabled/mysite.co.uk.conf:
AllowOverride not allowed here
Action 'configtest' failed.
The Apache error log may have more information.

Altering the vhost worked (thanks to https://stackoverflow.com/users/308825/maerlyn).

Placing a directory tag with the Allowoverride All fixed the issue. Seems that the rewrites are specific to each vhost.

Here is my config for the symfony tutorial which is now functioning in prod mode:

<directory /var/webroot/www/vhosts/mysite.co.uk/htdocs/Symfony/web/>
  Options Indexes FollowSymLinks MultiViews
  AllowOverride All
  Order allow,deny
  allow from all
</directory>

<virtualhost *:80>

  # Admin email, Server Name (domain name) and any aliases
  ServerAdmin webmaster@domain.com
  ServerName  mysite.co.uk
  ServerAlias www.mysite.co.uk
  ServerAlias local.mysite.co.uk

  # Index file and Document Root (where the public files are located)
  DirectoryIndex app.php
  DocumentRoot /var/webroot/www/vhosts/mysite.co.uk/htdocs/Symfony/web/

  # Custom log file locations
  LogLevel warn
  ErrorLog  /var/webroot/www/vhosts/mysite.co.uk/log/error.log
  CustomLog /var/webroot/www/vhosts/mysite.co.uk/log/access.log combined

</virtualhost>