XP user can't send Outlook attachments

[J.Kearney]

One WinXP Pro user can't send attachments using Outlook 2K.
Outlook 2K says it can't find or open the file; even if explicitly
typed in. If Outlook Express is used then there's no problem.

"Options" & "Customize" settings seem reasonable.

Other users on this system have no problems with Outlook 2K.

Gone so far as, un-installing Office 2K, deleting the directory,
reboot and reinstall.

This is really perplexing. And would really appreciate ANY(!)
pointers or ideas.

Thanks in advance.
Joe