.htaccess rule redirecting, but not rewriting - apache

Question

I am writing a simple rewrite rule.
I want all trafic going to a given path to get contetns from another
I have these rules:
Options +FollowSymlinks
RewriteEngine on
#this is the rule I am implementing
RewriteCond %{REQUEST_URI} ^/bar/$
Rewriterule ^(.*)$ "/foo/bar/" [L]
#This rule is working
RewriteCond %{QUERY_STRING} ^(.*)$
RewriteRule ^([a-zA-Z]+)$ "/foo/bar/index.php?fb=$1&%1 [L]
There is one rule more after this one and it's working:
Like before it does not work. Like this, it does:
RewriteCond %{REQUEST_URI} ^/bar/$
Rewriterule ^(.*)$ "/foo/bar/" [R,L]
I want to rewrite, not redirect, but I often use the R just to test.
I am probably doing something wrong, but what?
Note: I had another rule before, for rewrite, that worked. Its not missing any modules (I think).

Answer 1

After some fighting I discovered the problem.
For this rule to work:
#this is the rule I am implementing
RewriteCond %{REQUEST_URI} ^/bar/$
Rewriterule ^(.*)$ "/foo/bar/" [L]
It needs to be written like:
RewriteCond %{REQUEST_URI} ^/bar/index.php$
Rewriterule ^(.*)$ "/foo/bar/" [L]
It needed the index.php. You should replace for the file or resource that you have.