Messages

I was programing my P89V51RD2 using flash magic,but during the programing i pressed the reset buttom twice  ...after tht my P89V51RD2 is unable to enter into the isp mode by pressing the reset buttom.but earlier to tht it was working properly,but now it is saying "reset the device to enter in ISP mode" when programing ,but pressing the reset buttom nothing happens.
SO what to do....??