My dad recently got this old 1998 LEGO set.
It's a LEGO Cybermaster 8482


and it's in pretty good condition, but
I'm having trouble getting it to work.
I had to use a USB to serial connector to properly connect it to a laptop, however it can't connect properly.
It connects to the little one fine, and the bigger block is also getting a signal, but the bigger block isn't connecting to the little one (the little one is connected directly to the laptop and sends a signal to the bigger one and the bigger one is supposed to send a signal back)
I fiddled around with the firewall (turning it off) and with the serial to USB drivers, but it's stuck at that stage.
I tried two XP laptops, one couldn't connect at all whilst the other connects but cannot send a signal back.
I'm not sure how to fix this and idk if anyone else knows.
If anyone has any ideas, please tell.