subfolder multisite – infinite redirect loop sub-blog admin login

1. this is my enviroment:

WordPress 3.5.2
PHP 5.3.26
MySQL 5.5.31
Nginx 1.4.1

2. problem:
I install wordpress mutisite with sub-folder

my main site (abc.com) work fine, also can add new sub-blog (abc.com/subBlog)
but sub-blog has no theme (single post and main), and could not link to admin dashboard (abc.com/subBlog/wp-admin), infinite redirect loop happened! (302)
go to add new post (abc.com/subBlog/wp-admin/post-new.php) will return 404 not found)
3. already do:

add folder “blog.dir” on /wp-content/
change .htaccess to boilerplate https://www.ads-software.com/support/topic/fresh-install-subfolder-multisite-infinite-redirect-loop-sub-blog-login

<IfModule mod_rewrite.c>
RewriteEngine On
RewriteBase /
RewriteRule ^index\.php$ - [L]

# uploaded files
RewriteRule ^([_0-9a-zA-Z-]+/)?files/(.+) wp-includes/ms-files.php?file=$2 [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]
</IfModule>

but entire directory still not showing on location “blog.dir”,all problem still happen! any ideas?