To the best of my knowledge, all 1066 MHz DDR2 RAM requires more voltage than the stock 1.8V. There is no MB that I know of that will automatically increase RAM voltage to a value greater than 1.8V, based on SPD information.
Here is a typical pic of 1066 MHz DDR2 RAM. Note the recommended voltage to achieve this specified performance.
I would click "FAIL" for you if you would only re-enable the button!