error while opening mock exam

when i am trying to open mock exam link it is giving following error

Error page Scwcd_Error

An error occured in the bean. Error Message is: 0 >= 0
Stack Trace is :
java.lang.ArrayIndexOutOfBoundsException: 0 >= 0
at java.util.Vector.elementAt(Vector.java:431)
at com.javaranch.jspbeans.scwcd.QuizBean.execute(QuizBean.java:210)
at __jspPage7_carl_scwcd_scwcd_mock_jsp._jspService(__jspPage7_carl_scwcd_scwcd_mock_jsp.java:92)
at com.orionserver.http.OrionHttpJspPage.service(.:56)
at com.evermind._cp._vhc(.:5639)
at com.evermind.server.http.JSPServlet.service(.:31)
at com.evermind._deb._lnc(.:514)
at com.evermind._deb._wmb(.:170)
at com.evermind._co._wbb(.:581)
at com.evermind._co._fs(.:189)
at com.evermind._bt.run(.:62)

Thanks for reporting that; we'll look into it.

we people need to thank all of your team for such good website

I am still getting that error message

We are still looking into it. This may take quite some time. Sorry for the inconvenience.

The mock exam application is back in business.