对XC2S15直接写，JTAG，但显示失败？？？？

// *** BATCH CMD : Program -p 1
PROGRESS_START - Starting Operation.
Validating chain...
Boundary-scan chain validated successfully.
\'1\':Programming  device...
done.
INFO:iMPACT:579 - \'1\': Completed downloading bit file to device.
INFO:iMPACT:580 - \'1\':Checking done pin ....done.
\'1\': Programming terminated, Done did not go high.
PROGRESS_END - End Operation.
Elapsed time =      2 sec.

?????