multisite failed to import media

hi
i am web developer and i have mutli site wordpress
i tried with multiple themes import xml content and everting being importent expect the images. i import to sub domain site [ example : wwww.examplewebsite.com/newWebsite ]

this is my .htaccess
maybe this where the problem are?

# BEGIN WordPress
<IfModule mod_rewrite.c>
RewriteEngine On
RewriteBase /
RewriteRule ^index\.php$ – [L]

# add a trailing slash to /wp-admin
RewriteRule ^wp-admin$ wp-admin/ [R=301,L]

RewriteCond %{REQUEST_FILENAME} -f [OR]
RewriteCond %{REQUEST_FILENAME} -d
RewriteRule ^ – [L]
RewriteRule ^(wp-(content|admin|includes).*) $1 [L]
RewriteRule ^(.*\.php)$ $1 [L]
RewriteRule . index.php [L]
</IfModule>

# END WordPress

sorry for my english