GnuPG UNC path on windows problem

[Iron Sam Vane]

I'm attempting to encrypt a file on a remote server, both machines are
win2k3 server, using this command:
gpg --homedir c:\gnupg ---batch --trust-model always --output
\\server\backups\archive1.7z.gpg -e -r user
\\server\backups\archive1.7z

And I'm getting this error:

gpg: can't open `\\\\server\\backups\\archive1.7z': No such file or directory
gpg: \\\\\\server\\backups\\archive1.7z: encryption failed: file open error

I've checked and the file (archive1.7z) isn't in use. Any ideas what's going on?

Sean Lively