Not able to download program

Have you, perhaps, put the chip into some sort of "sleep" mode from which the debugger cannot wake it?

Or reconfigured the debug pins as IO ?

Or suchlike

Have you, perhaps, put the chip into some sort of "sleep" mode from which the debugger cannot wake it?

Or reconfigured the debug pins as IO ?

Or suchlike

Thank you for your reply.Problem is solved . Dont know how ,but i use another pc to download my program and it starts working. I again try it with old pc and its working.