I just bought the Dell WD15 dock for my XPS 13. It's pretty nice, but I'm having some trouble with the setup and I wondered if you folks might have some advice.

I've connected my Dell 3007WFP display via a mini displayport to DVI adapter (I can see why this might be the issue). It works, but I'm only getting a max of half the native resolution of the monitor. I'm stuck at 1280x800 instead of 2560x1600.

Does anyone know if it's the adapter or something else? From the specs of the dock it looks like this should be more than feasible using the mini display port, but I've probably missed something...