CodeIgniter - .htaccess file in captcha folder gets deleted - .htaccess

Question

I have CodeIgniter installed on WAMP in the root directory. The problem comes in here: I've been trying out the captcha's. My captcha folder is C:\wamp\www\captcha. The problem is the .htaccess file inside the captcha gets deleted when a new captcha is generated
The content of the .htacces file is:
RewriteEngine on
RewriteRule !.*\.jpg - [F,L]
RewriteCond %{SCRIPT_FILENAME} !-d
RewriteCond %{SCRIPT_FILENAME} !-f
RewriteRule (.*) - [F]
I use it to return a Forbidden ..... message if the .... .jpg file exists.
At the moment I only have this in the /view file. I haven't yet implemented any check/submit method. I feel I need to overcome this first.
$this->load->helper('captcha');
$vals = array(
'img_path' => './captcha/',
'img_url' => 'http://localhost/captcha/',
'img_width' => '150',
'img_height' => 30,
'expiration' => 25
);
$cap = create_captcha($vals);
echo $cap['image'];
Thanks in advance.

Answer 1

Answer is quite simple acctually: just create a folder inside captcha (in my case images), and edit the files accordingly:
.htaccess (in captcha folder)
RewriteEngine on
RewriteRule ^([0-9]+)\.([0-9]+)\.jpg$ ./images/$1\.$2.jpg [L]
RewriteRule !.*\.jpg - [F,L]
RewriteCond %{SCRIPT_FILENAME} !-d
RewriteCond %{SCRIPT_FILENAME} !-f
RewriteRule (.*) - [F,L]
other "view" file
$this->load->helper('captcha');
$vals = array(
'img_path' => './captcha/images/',
'img_url' => './captcha/',
'img_width' => '150',
'img_height' => 30,
'expiration' => 3600
);
$cap = create_captcha($vals);
echo $cap['image'];