Horde 5 Task issue - ISPConfig 3

[sjswarts]

G'day guys,

I have an issue with Horde 5 (already tried dealing with their support) Nag component to Horde Webmail Groupware.

Server:
Debian 6 Squeeze
ISPConfig 3.0.4.6
VPS
Dovecot, Apache2, Postfix, Bind
Horde is installed in directory /var/www/horde

The issue is related solely to the Nag module of Horde 5 as the rest have no issue (IMP, etc).

What happens is that when I try to create a New task it fails in the redirect.

This is taken from the log of Apache:

[Fri Nov 30 12:20:18 2012] [error] [client 91.149.61.36] File does not exist: /var/www/horde/nag/t, referer: https://www.example.com/horde/nag/task.php?actionID=add_task

This is my horde.conf

Alias /autodiscover/autodiscover.xml /var/www/horde/rpc.php
Alias /Microsoft-Server-ActiveSync /var/www/horde/rpc.php

Alias /Autodiscover/Autodiscover.xml /var/www/horde/rpc.php
#Alias /autodiscover/autodiscover.xml /var/www/horde/rpc.php
Alias /AutoDiscover/AutoDiscover.xml /var/www/horde/rpc.php

Alias /horde /var/www/horde
Alias /webmail /var/www/horde

<Directory /var/www/horde>
            Options +FollowSymLinks
            AllowOverride All
            order allow,deny
            allow from all
            AddType application/x-httpd-php .php
            php_value include_path ".:/usr/share/php"
            php_value open_basedir "none"
            php_value upload_tmp_dir "/var/www/horde/phptmp/"
</Directory>

<IfModule mod_rewrite.c>
#  <IfModule mod_ssl.c>
     <Location /webmail>

#      SSLOptions +StrictRequire
#      SSLRequireSSL
#      SSLRequire %{HTTP_HOST} eq "www.example.com"
#      ErrorDocument 403 https://www.example.com/horde

       RewriteEngine on
       RewriteCond %{HTTPS} !^on$ [NC]
       RewriteRule . https://%{HTTP_HOST}%{REQUEST_URI}  [L]

     </Location>
#  </IfModule>
</IfModule>

I have been asked if mod_rewrite is in effect on my server which I know it is.

Also if I put this code below to try and log the mod_rewrites apache fails to reload, even though the code is good according to multiple people.

RewriteLog /tmp/mod_rewrite.log
RewriteLogLevel 2

Any help would be greatly appreciated thank you.