url rewrite with blog url included

I need to configure my website with blog for url rewriting. to make it seo friendly i have placed url rewrite, where it count www.amadcrew.com and http://www.amadcrew.com saperate urls. following is the code which made it working perfectly.

# Redirect to www location
RewriteEngine on
RewriteBase /
RewriteCond %{HTTP_HOST} ^amadcrew.com [NC]
RewriteRule ^(.*)$ http://www.amadcrew.com/$1 [R=301,NC]

but some how i am unable to run my blog which url is .amadcrew/madcrew_blog. before it was working perfectly and now there is a white page i see.

kindly help me for url rewriting for seo friendly.

thanks