Closing open files on Windows 2003 as non-admin user

[boein]

Hi,

I cannot close my own open files on a remote server. When I open a document on a remote server, I can see this document in the list of open files on that server. Normally you should also be able to close it with "net file" or better with psfile (from sysinternals) but I always get "access is denied". Why can't I close my own files? DO you need special rights to close open files on a server, even if they are your own files.
Anybody ideas?

Thanks
Wim