i did wat u said ,but still getting that same" warning:cannot set sck period:please chek usbasp firmware",,and i am using arduino 1.0.1 and it has robotic controller m1 in boards,the problem is warning and also in starting wen i connect my board to pc it glows green first then to normal red,,,but now it is not glowing green wen i connect ,only the center led (ie,the led near to reset button) is glowing,is there any problem frm board 
thank u so much for replying