DigitalEclipse:
There are two methods of uploading, which did you use? I just went and checked both ways in my install and it worked fine. (one way is to upload a single image using the 4images admin cp, the other is upload pictures to the corresponding id number folder in /data/media/ and then hit the 'check new images' link in the 4images admin cp)
Did you make sure to upload the new sessions.php document to the 4images/includes folder (NOT the vBulletin/includes folder!!!) Did you set
Code:
// Set here the URL to your vBulletin forum. WITH trailing slash!
$url_app = "http://yourdomain.com/forum/";
in sessions.php of 4images?