Could be that you haven't plugged the led connectors into the motherboard properly, are you sure the live and ground pins match up to the live and ground on the motherboard.
hmm this might be it , this is my 2nd case that i have built so i don't have that much experience. But thank you for your tips will try this.
Also one more question are you talking about the LED pw H.D.D power cables etc?
or does that light maybe have a specially separate cable/wire ?