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Unable to run One class of Google API Toolkit given in the wiki..

Hi ,
I am trying to execute the REST  example of Google data API given in the wiki. The link to view the Example is :
The entire Toolkit code is given..
I am trying to execute the Contact API of the Google Toolkit.
I am not able to execute the 'AuthSubUtil.cls'.
The error says 'twiceEncodedNext' is undefined.
I am able to run all other classes related to Contact API.
Do I need to Include this Class..
Where am I going wrong..
Please help...