multisite sub sites image upload error

I recently moved a multisite from qponqutie.com to thecouponcutie.com. A few minor issues but it seems now the sub sites can’t upload images. The main site can, but the sub sites such as atlanta.thecouponcutie.com can’t.

At first, I would get this error:

Unable to create directory /var/www/vhosts/qponqutie.com/httpdocs/wp-content/blogs.dir/4/files/2011/09. Is its parent directory writable by the server?

So then I created the directory and got this error:

The uploaded file could not be moved to /var/www/vhosts/qponqutie.com/httpdocs/wp-content/blogs.dir/8/files/2011/09.

(these are 2 different sub-sites, but after I created the directory on the first, I couldn’t recreate the error to copy and paste so I set up another sub-site)

I tried chmod 777 on blogs.dir, didn’t work. Im on a Linux server and Plesk control panel. I have the default htaccess file that WordPress told me to add:

# BEGIN WordPress
RewriteEngine On
RewriteBase /
RewriteRule ^index\.php$ - [L]

# uploaded files
RewriteRule ^files/(.+) wp-includes/ms-files.php?file=$1 [L]

RewriteCond %{REQUEST_FILENAME} -f [OR]
RewriteCond %{REQUEST_FILENAME} -d
RewriteRule ^ - [L]
RewriteRule . index.php [L]
# END WordPress

Any help would be greatly appreciated.