Yes, the 20-289 is the correct cable for Win95 and the PRO95 scanners.
It looks like the Win95 program does not see the cable. First:

What version Windows are you using, XP or 98?

Is the 20-289 cable plugged into a COM port, or into USB-COM adapter?

RICHARD DAVIES wrote:
I have just about drove myself crazy.....I consider my self pretty good
at using my pc and the other programs on the pc that run my other
scanners...BC796D/ BCT8/ AND PRO2052/ ....BUT I HAVE TW0 PRO95'S
....And I can not operate the WIN95 PROGRAM......I have the right
cable ...20-289 ....from radio shack......and the pro95 manual does not
go into detail on how to do it.......nor does the place where you down
load the program? .....It seems ...self exsplanitory? But I click on
down load from scanner .....and all I get is either timed out bla bla
bla !! .....or unable to open port so and so !! ....I am fustrated !! Is
there a site I can go to that will walk me thru this thing?? ....Or can
some one help ...?? PLease.....I am going nuts !!! ....what am I doing
wrong..........signed ...Old Sarge .