WordPress site Redirects All pages to homepage.Please Help me ,ITS URGENT !!

Hello ,site URL -> http://www.smartfacilitysoftware.com/test/

And .htaccess file ->
RewriteEngine On
RewriteBase /test/
RewriteRule ^index\.php$ – [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]

Even if i click on contact ,about us page,it redirects to homepage ,please help me as soon as possible..