Hanged LM3S9B92 board

After trying FreeRTOS example for LM3S9B92 my board seems "hanged" (dead) - no response over Ethernet, no adventure game :) And I get message "Error to initializing target".
Last was cured by several turning on/off USB connector. But no game... :) And Finder can not find my board's IP...
After opening Putty on virtual COM port (created after installation of FTDI drivers - I'm talking about Windows:) with baudrate 115200 and reseting board by button on the board, I see message:

Colossal Cave Adventure
-----------------------
Connect to either the USB virtual COM port or
telnet into the Ethernet port in order to play.

MAC Address Not Programmed!

Aha! I ran LM Flash Programmer and on "Other Utilities" tab and:

1. Reset device by "Debug port unlock" feature (select "Tempest Class", click "Unlock" and follow instructions on message boxes)
2. Switch to "MAC Address Mode" and programmed MAC address (it's possible to use FF-...-FF).
3. Re-program device by original firmware (always save original firmwares!)

After this reseting device show in Putty session:

Colossal Cave Adventure
-----------------------
Connect to either the USB virtual COM port or
telnet into the Ethernet port in order to play.

IP: 169.254.3.0
Netmask: 255.255.0.0
Gateway: 0.0.0.0

...after "Wait..." and obtaining IP address. Finder found this IP address, and colossal game is working... over Ethernet :)