Problem with Ramps 1.4 and Arduino

I'd like to say I'm new to the forum. I look forward to the support that you all seem to give each other.

With that here is my problem:

I just received my ramps boards and my arduino mega2560's. I installed marlin via usb cable to the adruino and then proceeded to hook everything together for a dry run. My problem is that I'm using repetier host to print, the board is recognized and it connects but none of the motors will move when I give the commands. I seem to be getting power to both the adruino and ramps as the LED's light up.

I have:
Adruino2560
Ramps 1.4 (ebay)
DRV8825 (Pololo)