how do i get sky signal to new tv in room from digibox in living roomi?

i have sky satelite dish which sends signal to digibox then to main tv in living room i have put new tv in bedroom and run coaxcable back to main digibox in living room do not know why im not getting signal upstairs tried all conections on back of digibox make of digibox is a pace dv3 because i get sky down stairs thinking running cable would get sky upstairs getting frustrated info would be appreciatedjim