whoever modded your duo-r used a different pinout on the din jack than the one that most people use. you will either have to open the console or cable and swap wires. most likely just r and b are in different locations.
Thanks for the insight. I am not very well versed in modding and soldering. Is there someone based in North America who could help me with this? Or I may try and contact the seller of the RGB cable to see if they can make it to fit my console since they hand make them.
what city/state are you in? im sure someone can do this for you. RCA (who you bought it from) im sure will also let you return that on and swap the wires too. Just sometimes she can be a bit hard to get a hold of.
I'm in the Miami/Fort. Lauderdale area in Florida. RCA seems to be based in West Palm Beach which is a 30min-1hour drive from me which is great, whenever I have a question she usually responds on eBay in about a day or two.
Anyway, I want to also find someone to take a look at my PC Engine overall to adjust the CD drive.
Thanks for all the help guys,