Pioneer SR/Control on Receiver-need help

[Xtempo]

Pioneer:
VSX-1019AH-K Receiver
CLD-980 LaserDisc player
PD-F407 25 CD changer

I have other components would that effect anything?

I have used the CD changer and the Receiver in the SR/Pioneer control system for a few days/weeks and I tried today to hook up my LaserDisc player which now everything locked up and does not work including the remote. I can only turn on and off the receiver.

I have done the following:

CD IN->LD OUT-> Receiver IN-> CD OUT-> Receiver OUT- LD IN
Also:
CD IN/OUT->Receiver IN/OUT

I have not tried LD IN/OUT ->Receiver IN/OUT I'm afraid it doesn't work either.

With and without the 3.5mm Mono Cables:

LD-> Receiver DVD IN
CD-> Receiver CD IN