VNC History - "No data found"

Testing zimbra for potential production use at my institution. Zimbra Version:
8.0.6_GA_5922.FOSS

Installed the VNC History zimlet:

Name: biz_vnc_lightweight_history
Description: Displays history of email transmissions (1.0.3)

From: http://packages.vnc.biz/zmpkg/bootst...1.4.2.0.tar.gz

As far as I can tell it's installed. The web client shows 'Mail History' in the zimlets list in the left pane and dragging a sent mail item onto it opens a Mail History window. Problem is the window always says "No data found".

There are no records being added to the 'mail_history_mbox' table in the zimbra mysql database and I am not sure where to look for any error logs for this zimlet.

I am not exactly sure how this zimlet is supposed to work and the developers home page is, to be nice, lacking.

Anybody have any experience with this zimlet or any troubleshooting tips?

**UPDATE 1**
Was poking around and found an error getting logged in the /opt/zimbra/log/zmmailboxd.out file. This error occurs every time an email message is SENT:

INFO [biz_vnc_lightweight_history] Read mailbox.log file
ERROR [biz_vnc_lightweight_history] Error while getting Internal Mail Event from Log file java.lang.ArrayIndexOutOfBoundsException: 2
java.lang.ArrayIndexOutOfBoundsException: 2
at biz.vnc.zimbra.lighthistoryzimlet.RecipientInterna lMailHistoryLogging.getInternalMailEvents(MailHist oryLogging.java:206)
at biz.vnc.zimbra.lighthistoryzimlet.RecipientInterna lMailHistoryLogging.run(MailHistoryLogging.java:16 9)
at java.lang.Thread.run(Thread.java:744)

Anyway, I am giving up on this zimlet as it doesn't look very well supported or written.