sharing a document on my network

[Sammy]

I just upgraded to Word 2003. I created a word
document. I cannot open the document from 2 other
computers on my network, one uses Word 2000 and one uses
2003. My "My documents" folder is shared and "allow
users to change my files" is checked. "File permissions"
is set to unrestricted access. I do not use simple file
sharing, and the security tab says everyone has full
control. Word 2003 error message: "Word cannot open the
document: user does not have access privleges" and Word
2000 error message: The document name or path is not
valid. Try *check the file permissions fo the document or
drive" or use the file open dialog box to locate the
document".
Help!