If you go on the MDS server, can you open up a web browser and get to the page in the web service?
It is not a requirement for it to be on the same box.
That is part of the concept behind MDS and the pseudo firewall it creates between the "public" internet, and the web service and the device itself.
It creates another layer between the device/carrier and the back-end web service.
FWIW, my MDS apps have an "_" in front of the URI...
as for app path, I meant:
Bundle URL: http://fqdn/webdav/_/contact_lookup/...kup-2.3.26.jar
That is displayed when you look in BB Manager, at the Application Registry, and select an app...should be in the bottom pane.