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Ethernet problem with dsk6455, ndk 2.0.0, ccs 3.3

Hi, I want to do something with ethernet on dsk6455 with ndk 2.0.0 on ccs 3.3. I try to run first example (helloworld project) from ndk examples, but it always prints error:

TCP/IP Stack 'Hello World!' Application

Using MAC Address: 7f-80-81-82-83-84

EMAC OPEN Returned error 

Error: Unable to register the EMAC

 

I try with dhcp, static ip, direct connection to PC (cross cable) - nothing, I always get error. Does somebody has experience with this?

Thank you in advance,

Nikola