mga sir, patabang saakoa na newbie (not a techie)

just got my T240HD last night. i tried hooking up the laptop and im using the T240 now as i type.

i also have a satellite receiver DMBOX D90-S but i cannot get a colored picture. black and white lang

the tv connection terminal (from the satellite dish) goes in to the back panel of the DMBOX LNB IN, then on its right is the LOOP OUT, then on its right is is a 9-pin RS232 (i dont know whats it for), then audio left (red), audio right (white), then video (yellow)


i used the audio left (R), audio right (W) and video (Y) from the DMBOX to the the audio left, audio right of the T240HD. the remaining yellow cord goes to the Y of the PR/PB/Y composite in but i get a black and white picture

what cable/cord do i need? thanks sir