Images Broken on WordPress Subdirectory Multisite

I’m facing a serious Problem on my Multisite wordpress Network. When I upload Images on Sub-directory sites, the images shows broken. there is no blogs.dir folder on my server. Images Uploads on the Uploads folder. Please help me.

Mother site: http://www.onlineassam.co.in
error site: http://www.onlineassam.co.in/news
example of error post: http://www.onlineassam.co.in/news/htc-desire-600-launched-india-online-assam/
example of error image: http://www.onlineassam.co.in/news/wp-content/uploads/sites/4/2013/08/HTC-Desire-600-4.jpg

My .htaccess rules are given below:

RewriteEngine On
RewriteBase /
RewriteRule ^index\.php$ – [L]
RewriteCond %{HTTP_HOST} ^onlineassam.co.in$ [NC]
RewriteRule ^(.*)$ http://www.onlineassam.co.in/$1 [R=301,L]

# add a trailing slash to /wp-admin
RewriteRule ^([_0-9a-zA-Z-]+/)?wp-admin$ $1wp-admin/ [R=301,L]

RewriteCond %{REQUEST_FILENAME} -f [OR]
RewriteCond %{REQUEST_FILENAME} -d
RewriteRule ^ – [L]
RewriteRule ^([_0-9a-zA-Z-]+/)?(wp-(content|admin|includes).*) $2 [L]
RewriteRule ^([_0-9a-zA-Z-]+/)?(.*\.php)$ $2 [L]
RewriteRule . index.php [L]