If you're using the NLSC roster patch (I'm assuming you are, because I just checked and found out I hadn't updated all of the text

), you must install it to the correct folder.
If you're using Windows 98, it will be
C:\My Documents\NBA Live 2003\saves
If you're using Windows XP, it will be either:
C:\Documents and Settings\All Users\My Documents\NBA Live 2004\saves
or
C:\Documents and Settings\YourUserName\My Documents\NBA Live 2004\saves
(where YourUserName is your Windows XP Log-On Name)
Make sure you enter the destination folder as it appears here (substituting your Windows XP Log-On name if necessary).