Command to open explorer opens IE instead

I'm trying to issue the following VBA command within
Access XP that should open a folder that resides on a
linux web server.

C:\WINDOWS\explorer /root,HTTP://nw.pima.edu\~it\manage\KB
\

But, when it executes, Internet Explorer opens instead
(with the specified folder's contents displayed in the
browser's window).

I can use My Network Places to boil down to the same
location, but I need a button on an Access form to take
me straight there with the ability to add, edit, and
delete files.

Thanks in advance for your help.