access rights

From: rose (rfrescura@cdimed.com)
Date: 01/09/03 

From: "rose" <rfrescura@cdimed.com>
Date: Thu, 9 Jan 2003 12:17:24 -0800

if i use the url or just browse to a share, i can read the
contents but can't write anything. but if i map a drive to
that share, i can. (unless i am in administrators group,
then i can write either way). does anybody know why?