Warning: Directory does not exist!

I am trying to upload an image, but every time I tree I keep getting "Warning: Directory does not exist!"

My config file is as follows
// DIR
define('DIR_APPLICATION', '/home/vol15_6/byethost15.com/b15_20011754/htdocs//ocart/catalog/');
define('DIR_SYSTEM', '/home/vol15_6/byethost15.com/b15_20011754/htdocs//ocart/system/');
define('DIR_IMAGE', '/home/vol15_6/byethost15.com/b15_20011754/htdocs//ocart/image/');
define('DIR_LANGUAGE', '/home/vol15_6/byethost15.com/b15_20011754/htdocs//ocart/catalog/language/');
define('DIR_TEMPLATE', '/home/vol15_6/byethost15.com/b15_20011754/htdocs//ocart/catalog/view/theme/');
define('DIR_CONFIG', '/home/vol15_6/byethost15.com/b15_20011754/htdocs//ocart/system/config/');
define('DIR_CACHE', '/home/vol15_6/byethost15.com/b15_20011754/htdocs//ocart/system/storage/cache/');
define('DIR_DOWNLOAD', '/home/vol15_6/byethost15.com/b15_20011754/htdocs//ocart/system/storage/download/');
define('DIR_LOGS', '/home/vol15_6/byethost15.com/b15_20011754/htdocs//ocart/system/storage/logs/');
define('DIR_MODIFICATION', '/home/vol15_6/byethost15.com/b15_20011754/htdocs//ocart/system/storage/modification/');
define('DIR_UPLOAD', '/home/vol15_6/byethost15.com/b15_20011754/htdocs//ocart/system/storage/upload/');

Check the Permissions for the Image folder.
Try 755 first, that should work. If it still doesn't work, try 777, but that's not really recommended for the long term.

/htdocs//ocart/sys
cannot function !
Ernie