Network Drive Mapping

I have two Win 95 laptops using DUN to connect to our LAN. It seems no matter what I have tried all I can get is an error that says the sharename or folder cannot be found. I also have a Win 98 laptop that will connect without a hitch. I have compared the settings between the three machines and have found nothing that is apparently different between the Win 95 and the Win 98 laptop. Any suggestions or ideas?
Earlier I was getting a "Not logged in" error, but after making some changes now I get the other error.