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TSW1400EVM: TSW1400EVM JTAG_CHAIN_BROKEN_ERROR when download the firmware.

Part Number: TSW1400EVM

I connected my TSW1400evm and my TWS3070evm. And I cannot download the firmware to the TSW1400evm because of the error :" JTAG_CHAIN_BROKEN_ERROR". 

I am sure that I connected the devices in the right way. And my computer operation system is windows 7.

I checked the R55 and there is no resistor on it.

And my power supply is DC 5V/3A .

All the user_led 0-7 are not light up.

Only one led (at the left part of the board) is light up. 

Besides, the edition of my TSW1400evm is rev D