it sounds like it could be either an app problem or a network...

issue.

here's what i would do:

1. ask ur IT and their IT to check which TCP/UDP ports they have opened on their firewall versus yours, it could be that the app uses things like local ports and drive space for temp file, and somehow the firewall settings at their location is not letting that traffic through.

2. double-check ur app code to make sure NOTHING is hard-coded, i.e. you're using the temp directories etc. provided by the remote environment.

3. try to run the app under RDP (Windows Terminal Server) or other remote access program and see if that works. citrix metaframe DID have some problem with windows server 2003. worst come to worst, RDP can be a temporary solution.