audio/video problem

hey all, i really need some help, i'm building a custom van. and i have the stereo and video installed. but my problem is i can't get the audio from my dvd player to go through my stereo. here is a quick run down.
i have a pioneer deh-p880prs head unit. a farenheit dvd-36 dvd player.
a pioneer xm reciever gex-p920xm. i have the 3 outputs thats on the stereo going out to the 3 amps in the back, the xm is of course hooked though the cables they supply to connect the unit to the stereo. my question is. how can i hook the audio out from the dvd player up so they go through my stereo when i have the dvd player on. ?

thanks in advance i hope someone can help me, i am at a stand still

forgot to add i have a cd-rb10 conntected to the gex-p920xm, and the audio outs from the dvd player is plugged into to it, if i tune the head unit to aux2 and crank the volume wide open i can just barely hear it through the speakers, and i mean barely. i have to hold my ear up to the speakers

ok, well i fixed it lol. while running the rca/vid cables i some how forgot to hook the one end up to the rb10 correctly. fixed that and now i have sound pumping through all 22 speakers

This should be pretty easy,  you really need to check the connections of the rb10.  If it is not connected correctly you will not have sound pumping from any of your speakers.  Check that and let us know what you find.  Hope this helps, I think it will.

yea, you must have missed my last post