read write locked with isp programmer. plz help

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yasir23

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Tutorial Microcontroller MCS-51 ATMEL ISP

i m using your isp programmer.
its working. but after sometime i used it again.so its giving me error.even that the initialize target is going fine.


the device is read/write locked.

i used 12 mhz crystal.
plz help.
i need very much.

THANKS
 

stk200/300 compatible hardware means ? can you provide software
 

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