MultiSite Image not loading

HI, Great plugin , works great on 1 thing.

We have a multisite WordPress instance running.

2 servers with Apache, Mysql(master slave), PHP and oafcource wordpress.
Sites using a shared storage for all wp-content (plugings, uploads, etc)
The upload directory is secured with a .htaccess so somebody can’t deeplink directly to the content.

When i using Image Point a site A , upload the image to mediafolder(wp-content/uploads) and using this with the imagepoinst this will word on site A , but when i opening the page on site B, there is no imagemap only the pint.

When i check the image URL on server B the URL in pointing to server A

If a swap the procedure (upload and use image on ServerB) the problems moves to server A.
Tryed to change the url in de database but then its broken on both servers.

With all other uploaded content(images, pdf’s etc) there is now problem.

Is there a way or can it been fixed so the “hostname” wil be dynamic?
like http://<hostname or ip>/wordpress.

Thanks
Mickel