Image in CKFinder browser exist, but I can't find the image..

Question

Hi everyone,

I'm using CKFinder 1.4.3, integrated with CKEditor. I use it with CI. The upload folder of CKFinder is named 'uploads'.

And then, I modified an .htaccess file, like this:
RewriteRule ^(ckeditor|ckfinder|uploads)/(.*)$ webroot/$1/$2 [L]

So, when i want to see the image , the url would be like this:
http://blabla.com/uploads/images/image.jpg

In CKFinder config, I modified 2 vars:
$baseUrl = "http://".$_SERVER["HTTP_HOST"].'/uploads/';
$baseDir = 'www/webroot/uploads/';

I can upload the file from CKFinder window, I can see the thumbnail of the image, but when i select the image, the image doesn't exist. The weird is, I check the folder 'www/webroot/uploads/_thumbs/Images/' in ftp, I don't see the thumbnail image.

So, where the thumbnail image is uploaded?
How can i fix the configuration in CKFinder?