F40CAB

hi my first post on here. just bought new camera works during the day but as soon as ir's come on it loses video, ive now narrowed it down to a power problem. i dont know how to solve it, is it the cable or is it the PS not big enough. the camera is 60m 1000tvl ir camera. it says on it 550ma 12v and in the booklet it says POWER CONSUMTION:- <7W. The PS im using is from another set and is a 12v 5amps. this is spec for camera http://www.farnell.com/datasheets/1855835.pdf

Thanks for reply. Im using a pre made power supply cable that I had with the other kit but using seperate video cable. What wire should I be using for the power side. Thank you.