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ADSP 21262 Problem with JTAG Interface

I have designed a custom board with ADSP21262 processor. The JTAG test of the HPUSB-ICE passes successfully. But when I am trying to connect to the session, it is not connecting. It is showing an unknown error message(0x40008005).

JTAG scan failed-Check target power and emulator connection

DSP could not generate emulator interrupt.

why does this happen?

please help me..

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