How to enable mod_rewrite on virtual host (not working?)

[007casper]

I am trying to forward subdomains. I have tried many things and somehow failing to redirect.
I am using apache2 + tomcat on ubuntu 10.4. I also have proxy_ajp installed.

I changed AllowOverride None to AllowOverride All for mod_rewrite

so far I have this down below without succes in vhost file

<Directory /var/www/>
Options Indexes FollowSymLinks MultiViews
AllowOverride All
Order allow,deny
allow from all
<IfModule mod_rewrite.c>
Options +FollowSymLinks
Options +Indexes
RewriteEngine On
RewriteBase /
RewriteCond %{HTTP_HOST} !www.domain.com$ [NC]
RewriteCond %{HTTP_HOST} ^(www.)?([a-z0-9-]+).domain.com [NC]
RewriteRule (.*) %2/$1 [L]
RewriteRule /web/%1
RewriteRule ^/[0-9]+/[0-9]+/[0-9]+/(.*)?$ /new/blogs/$1 [R=301,NC]
RewriteRule ^blog/([A-Za-z0-9-]+)(.*)\.html$ /new/blogs/$1 [R=301,NC,L]
</IfModule>
</Directory>

I also tried

RewriteCond %{HTTP_HOST} ([^.]+)\.domain.com [NC]
RewriteRule ^(.*) http://www.domain.com/dir/%1 [P]

without success.

in http.conf

<IfModule mod_rewrite.c>
RewriteEngine On
RewriteLog /private/var/log/apache2/rewrite.log
RewriteLogLevel 9
</IfModule>

I dont get anything written on the log file, which is weird.

in addition to that, if I put logging in vhost apache2 cant restart. It gives me error on restart.
RewriteLog /var/log/apache2/rewrite.log
RewriteLogLevel 9

I need to redirect
domain.com to www.domain.com

and

dir.domain.com ---> http://www.domain.com/dir/
dir.name.domain.com ---> http://www.domain.com/dir/name

also I would like to redirect old pages to new pages with rewrite rules

RewriteRule ^/[0-9]+/[0-9]+/[0-9]+/(.*)?$ /new/blogs/$1 [R=301,NC]
RewriteRule ^blog/([A-Za-z0-9-]+)(.*)\.html$ /new/blogs/$1 [R=301,NC]

I used these links without any luck.
http://ubuntuforums.org/showthread.php?t=1038082
http://www.mediacollege.com/internet...ubdomains.html
http://www.addedbytes.com/articles/f...-for-beginners
http://magicmonster.com/kb/app/apache/neat_urls.html
http://httpd.apache.org/docs/current...d_rewrite.html

What am I doing wrong? Here is my current vhost

<VirtualHost *:80>
	ServerAdmin webmaster@localhost
	ServerName www.domain.com
	ServerAlias www.domain.com domain.com *.domain.com
	RedirectPermanent / http://www.domain.com
	DocumentRoot /var/www
	<Directory />
		Options FollowSymLinks
		AllowOverride None
	</Directory>
	<Directory /var/www/>
		Options Indexes FollowSymLinks MultiViews
		AllowOverride All
		Order allow,deny
		allow from all
	<IfModule mod_rewrite.c>	
		Options +FollowSymLinks
		Options +Indexes
		RewriteEngine On
	#	RewriteLog /var/log/apache2/mod_rewrite.log
	#	RewriteLogLevel 9
	#	RewriteBase /
	#	RewriteCond %{HTTP_HOST} !www.domain.com$ [NC]
	#	RewriteCond %{HTTP_HOST} ^(www.)?([a-z0-9-]+).domain.com [NC]
	#	RewriteRule (.*) %2/$1 [NC]
		RewriteCond %{HTTP_HOST} ([^.]+)\.domain.com [NC]
		RewriteRule ^(.*) http://www.domain.com/web/%1 [P]
	#	RewriteRule /web/%1 [L]
	</IfModule>	
	</Directory>

	ScriptAlias /cgi-bin/ /usr/lib/cgi-bin/
	<Directory "/usr/lib/cgi-bin">
		AllowOverride None
		Options +ExecCGI -MultiViews +SymLinksIfOwnerMatch
		Order allow,deny
		Allow from all
	</Directory>

	ErrorLog /var/log/apache2/error.log

	# Possible values include: debug, info, notice, warn, error, crit,
	# alert, emerg.
	LogLevel warn

	CustomLog /var/log/apache2/access.log combined

    Alias /doc/ "/usr/share/doc/"
    <Directory "/usr/share/doc/">
        Options Indexes MultiViews FollowSymLinks
        AllowOverride None
        Order deny,allow
        Deny from all
        Allow from 127.0.0.0/255.0.0.0 ::1/128
    </Directory>
	<Proxy *>
	Order deny,allow
	Allow from all
	</Proxy>
	
	ProxyPass / ajp://localhost:8009/
	ProxyPassReverse / ajp://localhost:8009/
</VirtualHost>

Please advise. Thank you so much.