When you type the compters name, type it exactly like this. ...\\computersname\.....two slashes in the front and one slash at the end with no "share" after it. Also try this link. It greatly helped me when I set up my network.
http://www.tomsnetworking.com/Sectio...le64-page1.php
Very simple and easy to follow step by step instructions. Hope this helps.
Peace,
Rob Bond