I'm not familiar with that board, but here's some ideas...
1) Are you certain that the serial connection between the board and the computer is working? Usually when the board powers up, the serial monitor will fire out a greetings banner with a version number. The board's documentation should tell you the default data rate. Power up the board and monitor the PC's serial port with HyperTerminal or similar terminal program. If you don't see that banner, the serial connection is bad, somehow.
2) Have you checked to ensure that the board jumpers are set correctly? That is, the board is going to be in the debug mode as opposed to the stand-alone mode, and that the serial port will be used for debug communications?
HTH,
---Tom