I just bought an XPS L702x and a U2711 Monitor. I have been to Best Buy two times trying to get the right cables. Once with my laptop and the other armed with a picture of the back of the monitor ports. I'm not getting it right. Right now I have a Rocketfish HDMI cable hooked to both the lapttop and monitor and I have the little box floating around the monitor "No DVI-D1 Cable" What does that mean? Can someone tell me in plain English what I need to get to make these two work together! I create videos as one of my business...so I REALLY need to make these two work together!!!!! Thanks!!!!!!!!!!!!