Backtrace not running

Hi, I'm using EV10Sp3.  I am trying to troubleshoot an error incthe event log with id 8390 (Host not found).  So I set up a Backtrace to capture it, but it won't start.  The event occurs but no logging happens. 

These are the registry settings I have:

In HKLM\sotware\Wow6432Node\KVS\Enetrrpise Vault\Backtrace

Enabled=1

Exclude=<blank>

Include=8390

LogFileKeepDays=14

LogFolderPath=<blank>

MaxEventsOfEachTypePerDay=5

RuleType=Include

What am I doing wrong?

Thanks.