Word 2000 files not opening

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From: the file name of file is not available (anonymous_at_discussions.microsoft.com)
Date: 04/19/04 

Date: Mon, 19 Apr 2004 11:46:51 -0700

Word 2000 was working great, but last night when saving a
doc, the message "the file 'normal' already exists. Do
you want to replace the existing file?" I clicked "yes",
and now I cannot open an Word Doc. I get a message "The
file <Name> is not available. Does anyone have any ideas
on how to fix this? I'm using Windows XP.