.htaccess重定向L，NC，QSA不按计划工作

so i got these lines in my htaccess

<IfModule mod_rewrite.c>
RewriteEngine On
RewriteBase /

RewriteRule ^de/exposes/(.*)$ /exposes/?l=de_DE&m=$1 [L,NC,QSA]

RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME}/index.html !-f
RewriteCond %{REQUEST_FILENAME}/index.php !-f
RewriteRule . index.php [L]
</IfModule>

and following url:

dev.example.com/de/exposes/whatever

the htaccess checker says, it works as planned and redirects blind to dev.example.com/de/exposes?l=de_DE&m=whatever. but it doesnt. there is always a 404 error.

if i change [L,NC,QSA] to [L,P] it says: object not found.

if i change [L,NC,QSA] to [L,R] it goes to the right URL, but changes the URL and that is what i want to avoid.

Any ideas?

Greetz and thanks

Have it this way:

<IfModule mod_rewrite.c>
RewriteEngine On
RewriteBase /

RewriteCond %{REQUEST_FILENAME} -f [OR]
RewriteCond %{REQUEST_FILENAME} -d
RewriteRule ^ - [L]

RewriteRule ^(de/exposes)/(.+)$ $1/?l=de_DE&m=$2 [L,NC,QSA]

RewriteCond %{REQUEST_FILENAME}/index.html !-f
RewriteCond %{REQUEST_FILENAME}/index.php !-f
RewriteRule . index.php [L]
</IfModule>