This week's book giveaway is in the OCMJEA forum. We're giving away four copies of OCM Java EE 6 Enterprise Architect Exam Guide and have Paul Allen & Joseph Bambara on-line! See this thread for details.
First, I searched for the problem, I didn't find. Then I looked at code and somewhere in the code, you comment your question, which is at all not attentive in any manner.
Second, if you posted the error that will yield more answer and error are sometime self explainable.