Connecting DVD, VCR thru Stereo receiver!!

I am using a Technics AV Control Stereo Receiver SA-GX330, and am trying to run my DVD Player (RCA), my VCR (Quasar) and my Gamecube into it. I am using an RCA splitter to get all of these items into the reciever but nothing is working. Here's what I've done so far:

1. I ran RCA cables from each of these devices into the splitter.

2. I ran an RCA cable from the splitter's output into the input of the Stereo Receiver.

3. Than I ran another RCA cable from the Receiver's output to the TV.

Now when I tried to play a DVD nothing come up n the TV. I have it set on TV/Video, and I have tried every configuration on the Receiver I can think of. Any help would be greatly appreciated. I am tearing my hair out!

- Ben