Forget about running 2gb stick at 1066Mhz at Cas4...
And NB at auto is a sign you didn't do ya homework before clocking this board... 1.26NB voltage is more than sufficient for 500FSB/1000mhz ops...secondly most of these board overvolts the ram with 0.08, so you are feeding ya reapers with 2.2volts which is not required at all, put in Trfc 55 and try to run static read control enabled... then try to mess with the PL's...