Can't map to share from one particular machine?

Hi,

I created a share on a Windows 2000 Dev server and added my domain account
as having full permissions. I'm also added to the Administrators group.

From my XP client, I'm trying to connect to the share with my domain account
by using "Search for Computers" or by mapping to it in Windows Explorer
using \\servername\sharename but I keep getting prompted with the login box.

However, I have connected to the same share from another desktop using the
method above so it seem to be something with the first XP machine.

I'm looking for methods to debug this problem in terms of trying to identify
what is being passed to the server when I get prompted to login or if there
is client software installed that interfering? Can a previous password be
cached on the XP side or can it be something with a login script?

Thanks for any pointers. Dave.

Dave