2nd WP Install in subdirectory

Hi,
have a WP install at lets say

blog.com

Want to make a separate install

blog.com/en

to run another language version

After installing into /en have some troubles with redirects or logins. (“site url” and “WordPress url” are “blog/en”, )

for blog/ I have .htaccess

<IfModule mod_rewrite.c>
RewriteEngine On
RewriteBase /
RewriteRule ^index\.php$ – [L]
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule . /index.php [L]
</IfModule>

for blog/en

<IfModule mod_rewrite.c>
RewriteEngine On
RewriteBase /en
RewriteRule ^index\.php$ – [L]
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule . /en/index.php [L]
</IfModule>

but I get redirects from blog/en/wp-login.php after entering login and pass to blog/ with 404 error.

in case I define in WP-config of blog/en again my “site url” and “WordPress url” I don’t have redirect but can’t login.

Any ideas?

Tried some hacks to .htaccess of blog/ like adding:

RewriteCond %{REQUEST_URI} !^/en

but it didn’t help.