Really Strange Problem With Uploads

[eluser]phpprogrammer[/eluser]
I just developed an entire application locally using XAMPP (Apache/PHP/MySQL)

Uploads worked great running locally. But when I put everything on the live server, suddenly uploads don't work anymore!

My script dynamically creates folders using mkdir() and then uploads images into those folders. The permissions are always set to 777.

Now, this is the really strange thing... When I moved the site, I moved some folders created on my local machine. There is no problem uploading to those folders. New folders can be created no problem. However, if I upload to a newly created folder, I get the message "ERROR: The upload destination folder does not appear to be writable." and nothing happens! I checked the permissions, and everything is 777.

Here are the 2 important lines from my code:

Code:

$config['upload_path'] = BASEPATH.'../img/'.$folderid;
$this->load->library('upload', $config);

When I echoed out the upload path, it gave me /var/www/vhosts/mysite.com/httpdocs/testing/system/../img/76. This path only works for uploading to the old folders.

What is the problem with CodeIgniter? I am pulling my hair out trying to get this to work! I'd really really appreciate any small bit of assistance