Getting error when attempting to create a workbook using Java POI API

I am getting an error when trying to create a workbook. I have attached the error stack from the debug screen. This is the first time I have run into this issue and I think it may have something to do with the recent upgrade to Microsoft Office 2010 and I'm now trying to read .xlsx files where before I was reading .xls files. As such, it might mean I need some different jars. If so, how do I go about adding them to the application. As always, any help is greatly appreciated.
error-stack.txt
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awking00Asked:
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Jack FrostCommented:
I've not used POI and someone who has may be able to give more specific help.  Also you didn't really describe your environment very much.  Windows/Mac/Linux.   How the app is launched,  cmdline/script/somethingElse.  Sorry if this is all obvious to someone who knows POI.

I think you looking for the POI-HSSF and or POI-XSSF related jar files.  You may need to verify that they are somewhere in your system.  

Once you have loaded/located the jar files there are generally two ways to specify where to find the .JAR files to the JVM.

The CLASSPATH environment variable.
The -cp/-classpath command line parameter of the java jvm.   Try java -h for parameters.

To make adjustments you may need to track down a launch script.  Or the parameters of a desktop launch widget.  The CLASSPATH could also be set by login scripts.

This article talks a bit about the CLASSPATH environment variable: http://docs.oracle.com/javase/tutorial/essential/environment/paths.html
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awking00Author Commented:
Added information - The environment is Windows and the application is being launched via Eclipse.
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Jack FrostCommented:
So your using run/debug?  I've only used Eclipse as a development environment. Usually Eclipse is pretty good about including Jars that are part of a project.   You can check the settings under:

Run -> Run Configurations.  Choose the application in the list then click the Classpath tab.

Pretty much the same for debug configurations.

If your jars are not in the list you can add them manually in the User Entries.  But you may also want to check your project dependencies if you think the jars are in location that is known to the project.
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awking00Author Commented:
Please bear with me as I am awaiting the installation of a new version of Java that I belileve contains the jar file(s) that I need. I work in a place that makes one go through hoops to install any new software. I will close the question when I find that the upgrade solves my problem.
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awking00Author Commented:
The jar files I needed were just recently made available and adding them to my class path took care of the issue.
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