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TMS570LC4357: TMS570 MCU : TMS570LC43HDK unable to flash the code

Part Number: TMS570LC4357

Tool/software:

Error connecting to the target:
(Error -2131 @ 0x0)
Unable to access device register. Reset the device, and retry the operation. If error persists, confirm configuration, power-cycle the board, and/or try more reliable JTAG settings (e.g. lower TCLK).
(Emulation package 12.7.0.00105) 

Hello, 

I am facing an issue with the LC43x development kit. when powered ON using the USB interface, the D12 LED turns on. But when I try to flash it , it fails with the above error. 

Also while trying to flash, none of the LEDs D52, 53. 54 or 55 tend to glow. 

I need some help in solving this issue.

Thank you !