Problems while running IBM ViaVoice

Hi there.
I've downloaded and tested the code from IBM found on this website: http://www.ibm.com/developerworks/ibm/library/i-voice/

Am using WindowsXP as OS.

The code is not working, am having an error as follows:
Exception in MAIN method:java.lang.NullPointerException.

Am unable to debug it..

I'll sincerely appreciate your help on this forum.

Thanks.
Kindly reply

Take care.