WordPress MU

WP Super Cache Manager:
WP Super Cache Status
ON (WP Cache and Super Cache enabled)
...
Mod Rewrite Rules
Mod Rewrite rules cannot be updated!
You must have BEGIN and END markers in /var/www/dinar/wp/.htaccess for the auto update to work. They look like this and surround the main WordPress mod_rewrite rules:
# BEGIN WordPress
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule . /index.php [L]
# END WordPress
Refresh this page when you have updated your .htaccess file.

my .htaccess file:

RewriteEngine On
RewriteBase /

#uploaded files
RewriteRule ^(.*/)?files/$ index.php [L]
RewriteCond %{REQUEST_URI} !.*wp-content/plugins.*
RewriteRule ^(.*/)?files/(.*) wp-content/blogs.php?file=$2 [L]

# add a trailing slash to /wp-admin
RewriteCond %{REQUEST_URI} ^.*/wp-admin$
RewriteRule ^(.+)$ /$1/ [R=301,L]

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

<IfModule mod_security.c>
<Files async-upload.php>
SecFilterEngine Off
SecFilterScanPOST Off
</Files>
</IfModule>

Please explain your question before spitting out code for us to interpret.

hello.
super cache says that i should surround main wp rules in .htaccess file with "# BEGIN WordPress" and "# END WordPress".
should i surround "
RewriteCond %{REQUEST_FILENAME} -f [OR]
RewriteCond %{REQUEST_FILENAME} -d
RewriteRule . - [L]
RewriteRule ^([_0-9a-zA-Z-]+/)?(wp-.*) $2 [L]
RewriteRule ^([_0-9a-zA-Z-]+/)?(.*\.php)$ $2 [L]
RewriteRule . index.php [L]
"? (i now think it should be so, and am going to try.)

i have written and refreshed the super cache control page.
it have said:
"To serve static html files your server must have the correct mod_rewrite rules added to a file called /var/www/dinar/wp/.htaccess
This can be done automatically by clicking the 'Update mod_rewrite rules »' button or you can edit the file yourself and add the following rules. Make sure they appear before any existing WordPress rules.
# BEGIN WPSuperCache
<IfModule mod_rewrite.c>
RewriteEngine On
RewriteBase /
...
RewriteCond %{DOCUMENT_ROOT}/wp-content/cache/supercache/%{HTTP_HOST}/$1/index.html -f
RewriteRule ^(.*) /wp-content/cache/supercache/%{HTTP_HOST}/$1/index.html [L]
</IfModule>
# END WPSuperCache

and there are button "update mod rewritew rules>>".
i have pressed it.
it have changed htaccess file , but i don't know whether it is correct. because it says "Make sure they appear before any existing WordPress rules." but they are actually before the "main rules" that i have just determined. so there are "
RewriteEngine On
RewriteBase /
" and "#uploaded files" and "# add a trailing slash to /wp-admin" sections before super cache rules.

i have moved the super cache rules to the beginning of the file and it seems to be working.