First, try upping the voltage in the BIOS to 2.0v or 2.1. I had the same issue with my computer since my motherboard defaulted to 1.8v and my memory needed more juice. It's perfectly within the memory manufacturer's specs, so overvolting from 1.8v to 2.0 won't bother the ram. Otherwise you can also try underclocking your ram. I've heard that the 1066mhz ram is just overclocked 800mhz ram.
Hope this helps