Controlling Pioneer 45 VSX

Hello, I am trying to use a serial itach to control the reciever. I have a null cable. Can’t get any response from receiver. Any help would be great. I can see the itach from roomie. I have tried each unit that is listed. Thanks!

We have a FAQ for diagnosing serial issues:

I will make sure that everything is correct per what you suggested. Do you have an idea which one i should choose for that model? Thanks. WIll try when I get home.