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TM4C1294NCPDT: Ethernet Firmware Update

Part Number: TM4C1294NCPDT

I am trying to program the kit frrom ethernet i burn boot_emac_flash using Code Composer Studio then i burn boot_demo_emac_flash using LM Flasher via Ethernet and then i burn blinky via ethernet but nothing happened and the led does not do anything 
did i miss anything ?