.htaccess problem

Can someone tell me why this isn't working:

Code:

# BEGIN WordPress
<IfModule mod_rewrite.c>
    RewriteEngine On
    RewriteCond %{REQUEST_FILENAME} !-f
    RewriteCond %{REQUEST_FILENAME} !-d
    RewriteRule .* index.php [L]
</IfModule>
# END WordPress

RewriteEngine On
RewriteBase /
RewriteRule ^the-next-mustang-a-first-look-at-the-2009-ford-mustang http://www.mustangevolution.com/2006091981/ [L,R=301]
RewriteRule ^2007-shelby-gt-mustang-information/ http://www.mustangevolution.com/2007-shelby-gt/ [L,R=301]
RewriteRule ^no-4-door-mustang-says-ford/ http://www.mustangevolution.com/20061216140/ [L,R=301]
RewriteRule ^viva-la-mustang-ford-releases-giugiaro-mustang-information/ http://www.mustangevolution.com/20061128122/ [L,R=301]
RewriteRule ^2008-boss-mustang-return/ http://www.mustangevolution.com/2006072617/ [L,R=301]
RewriteRule ^the-legend-mustang/ http://www.mustangevolution.com/2006082756/ [L,R=301]
RewriteRule ^2009-warrior-in-pink-mustang/ http://www.mustangevolution.com/2009-warriors-in-pink-mustang/ [L,R=301]
RewriteRule ^roush-to-produce-100-stage-3-blackjack-mustangs/ http://www.mustangevolution.com/20070219196/ [L,R=301]
RewriteRule ^2010-mustang-wagon-speculated-by-german-magazine/ http://www.mustangevolution.com/20061114116/ [L,R=301]
RewriteRule ^giugiaro-2010-mustang-concept-picture/ http://www.mustangevolution.com/20061128122/ [L,R=301]
RewriteRule ^2007-shelby-gt500-red-stripe-package/ http://www.mustangevolution.com/20070412311/ [L,R=301]
RewriteRule ^2006-aj-foyt-coyote-edition-mustang/ http://www.mustangevolution.com/20070122167/ [L,R=301]
RewriteRule ^commercial-video-shelby-gt500-in-germany/ http://www.mustangevolution.com/2006090870/ [L,R=301]
RewriteRule ^2007-saleen-h281-ford-mustang/ http://www.mustangevolution.com/20070503349/ [L,R=301]
RewriteCond %{HTTP_HOST} !^www\.mustangevolution\.com
RewriteRule (.*) http://www.mustangevolution.com/$1 [L,R=301]

Example:

http://www.mustangevolution.com/201008272354/ works
http://mustangevolution.com/201008272354/ doesn't work. Its suppose to add the www. to it and redirect it. Instead it redirects it to index.php

You should move non-www redirect (2 lines) to the top, like:

RewriteEngine On
RewriteBase /

RewriteCond %{HTTP_HOST} !^www\.mustangevolution\.com
RewriteRule (.*) http://www.mustangevolution.com/$1 [L,R=301]
# BEGIN WordPress
<IfModule mod_rewrite.c>
...etc

Code:

# BEGIN WordPress
<IfModule mod_rewrite.c>
    RewriteEngine On
    RewriteCond %{REQUEST_FILENAME} !-f
    RewriteCond %{REQUEST_FILENAME} !-d
    RewriteRule .* index.php [L]
</IfModule>
# END WordPress

RewriteEngine On
RewriteBase /
RewriteCond %{HTTP_HOST} !^www\.mustangevolution\.com
RewriteRule (.*) http://www.mustangevolution.com/$1 [L,R=301]
RewriteRule ^the-next-mustang-a-first-look-at-the-2009-ford-mustang http://www.mustangevolution.com/2006091981/ [L,R=301]
RewriteRule ^2007-shelby-gt-mustang-information/ http://www.mustangevolution.com/2007-shelby-gt/ [L,R=301]
RewriteRule ^no-4-door-mustang-says-ford/ http://www.mustangevolution.com/20061216140/ [L,R=301]
RewriteRule ^viva-la-mustang-ford-releases-giugiaro-mustang-information/ http://www.mustangevolution.com/20061128122/ [L,R=301]
RewriteRule ^2008-boss-mustang-return/ http://www.mustangevolution.com/2006072617/ [L,R=301]
RewriteRule ^the-legend-mustang/ http://www.mustangevolution.com/2006082756/ [L,R=301]
RewriteRule ^2009-warrior-in-pink-mustang/ http://www.mustangevolution.com/2009-warriors-in-pink-mustang/ [L,R=301]
RewriteRule ^roush-to-produce-100-stage-3-blackjack-mustangs/ http://www.mustangevolution.com/20070219196/ [L,R=301]
RewriteRule ^2010-mustang-wagon-speculated-by-german-magazine/ http://www.mustangevolution.com/20061114116/ [L,R=301]
RewriteRule ^giugiaro-2010-mustang-concept-picture/ http://www.mustangevolution.com/20061128122/ [L,R=301]
RewriteRule ^2007-shelby-gt500-red-stripe-package/ http://www.mustangevolution.com/20070412311/ [L,R=301]
RewriteRule ^2006-aj-foyt-coyote-edition-mustang/ http://www.mustangevolution.com/20070122167/ [L,R=301]
RewriteRule ^commercial-video-shelby-gt500-in-germany/ http://www.mustangevolution.com/2006090870/ [L,R=301]
RewriteRule ^2007-saleen-h281-ford-mustang/ http://www.mustangevolution.com/20070503349/ [L,R=301]

Still doesn't work

Please check the update post #2

Cool that worked. Thanks

You are welcome!