2nd screen issues

I have emailed sonymetc.com but no one has any idea on what the problem is. I have the Sony XAV-7W with the DVX-11A and have added a TFT LCD (PAL/NTSC Compatible) 7" color screen {No actual name brand but sold under MAK Electronics}. The DVX-11A switch on the DVD player is switched to others rather than XVM-R75. The video signal is coming off the XT-63V going to a XO Vision AMP7X video amplifier and then to the 2nd screen. I can play the "Chingy" DVD(comes with the music CD) just fine on both monitors as well as a couple of import car DVD's but when I put in a DVD movie the 2nd monitor says "No Signal." I have put a DVD movie in before and it shows up on the 2nd monitor for about 7 seconds and then shows "No Signal." I can shut the power off to my car or hit off on my DVD remote and turn it back on and the start up screen appears and I can start the movie off from where it was. I have tried switching brands of RCA that goes from the video amp XO Vision AMP7X to the second screen and have a new screen. I have run the RCA directly to the rear output of the DVX-11A DVD player to the video amp but am still having problems. I have also unhooked the video from my XAV-7W and hooked it directly to the 2nd screen. Nothing seems to help. I don't know if the main DVD menu settings have anything to do with my issue (video screen size, slide show, JPEG/MP3, etc)? I just don't understand why I can play music DVDs and not a movie on both screens?? Help!!! The Movies are REGION 1. The DVD's I've tried have come from Columbiahouse.com, Blockbuster, & Walmart. All the equipment was purchased from a PCI Marketing (Hawk Electronics) here in Texas. p.s.   I'm using a regular RCA.

if your regular RCA is of the twisted pair kind, get rid of it and get a proper video cable....Shaughn Murley

Install Manager, Dealer Services

Visions Electronics

Red Deer, Alberta