File Not Found with UNC Pathname

GLE Version 4.2.2 on Windows XP SP 3 (Version 5.1.2600)

I'm attempting to run gle from within WinEdt, using Emilio Torres's macro, GleExecute.edt. My LaTeX source files are located on a server and often opened using a UNC pathname, However, when I try to run gle, it fails. Running gle in the foreground reveals a "File not found" message. But if I assign the share a drive letter and re-open the same file as H:\Macquarie\Writings\Dynamics of Bayesian Trust Models\exp0.gle, it works fine.

I can reproduce the problem at the command line:

C:\Documents and Settings\les>type "\\fulbert\les\Macquarie\Writings\Dynamics of Bayesian Trust Models\exp0.gle"
size 10 8
set font texcmr
begin graph
[...]

so the file can be found by the type command. But when I try to run gle:

C:\Documents and Settings\les>gle /d eps "\\fulbert\les\Macquarie\Writings\Dynamics of Bayesian Trust Models\exp0.gle"
File not found: '\\fulbert\les\Macquarie\Writings\Dynamics of Bayesian Trust Models\exp0.gle'

The error message shows the entire pathname, so it's probably not a problem with parsing spaces in the pathname.