The Radio Information Board

Hello, While programming a TK-481 today I came up with an error, I was reading the Radio a Blam. "Check Radio type" Error came up. What the heck?? I have the right software KPG35D for the radio so what could this be. I've used this same cable before so I know it's not the cable? Any sugges...

Does anyone have the Schematic for the KPG-36 or the Pinouts for the 481, I'm in desperate need to program a TK-481. Thanks,