BIOSTAR G31 M7 TE Problem

My biostar G31 M7 TE motherboard
Turns off 2seconds after i press the cpu power button,then turns on automatically after some seconds and then shows:-
"overclock failed
press f2 to load defaults and continue
press del to enter setup"
this happens only when only when graphics card is plugged in
My card is nvidia 9600GT
The bios is AMI(American Megatrends)
I havent overcloked anything
please help

hwsit guys, i have the same mb as ul do,wel from wat i knw,if u had a processor of lower speed in ur pc before and if u overclocked it and changed the cpu it wont start up, on the other hand, in running a gforce 8600gt wid a 2.2dual core ov to 2.5 and i have no problems, so i suggest u to check the cpu fan,if its to tight it wont come on,check all hardware,if the problem stills persists den reset the cmos, u may have tried all of dis already,but do it again, or u can strip ul whole pc apart ,remove the cmos battery and leave the mb for abt 1hr den re essemble the pc dat should work,,,,,,,,,,,,,,,,,,,