Thank you both - I have searched extensively for solutions and found all websites and forums you both posted - none answered the mail. :-/ They offer solutions for getting on line with a dial-up modem - something I neither own nor intend to own again. What I do have is an Asante Desktop EN/SC adapter that plugs into the SCSI port in the back of the Macintosh in order to use my LAN connections (read: cable high-speed internet).

As the first responder wrote, I may well be SOL on this, but I've got to believe that some bright bulb out there has come up with a viable solution to this - I cannot be the only cat out there to have bought an Asante Desktop EN/SC adapter for his Mac, only to find that it's little better than an expensive paperweight. As I wrote in my initial post, my MacBook Pro does see my old Mac, but I cannot get it to do anything other than see it. Currently, the only means I've got for sending data back and forth is a USB floppy drive.