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NDK2.0 6747 RJ45 does not work

Greetings all!

My 6747 has success with test program of  emac_loopback. But  I do NDK2.0  hello word is not work.The problem is:

TCP/IP Stack 'Hello World!' Application
 
Using MAC Address: 00-08-ee-03-14-99
 EMAC should be up and running 
EMAC has been started successfully
Registeration of the EMAC Successful
Network Added: If-1:192.168.0.11

And then stop this. My RJ45 does work on my  PC and  6747 Platform . What is The problem ?My program?My RJ45 on PCB ? Thank you very much!