cw5.1烧录s9s12g128报错，用pe烧录不成功，怎么解决，

"NVM memory control" "Error while loading diagnostic algorithm to target system. The chip may secured or the derivative selected may be wrong"
以上英文是错误显示。。不是所有板子都这样，20块里有一块会报这种错误。请问是什么原因