Error 500 problem with .htaccess

I have a problem with my .htaccess file

When I have uploaded my application to a hosting of 1 & 1 it returns an error 500, I have tried to comment all the lines of the file and it stops giving the error.

 RewriteEngine On
 RewriteRule ^$ index.php [L]
 RewriteCond %{REQUEST_FILENAME} !-d
 RewriteCond %{REQUEST_FILENAME} !-f
 RewriteRule ^(.*)$ index.php?urlparams=$1 [QSA]

This is the content of my file. Is there something wrong?