Problem with Vacation module

I'm trying to install the Vacation module in Horde 3.1.4, using the SQL 
driver.  I'm getting the dreaded blank error:
Error  Failure in modifying vacation notice:
that's it, no actual error notice.  I set horde logging to "DEBUG", but 
there were no obvious problems, and no messages in the apache error_log
here's the vacation config file

/* CONFIG START. DO NOT CHANGE ANYTHING IN OR AFTER THIS LINE. */
// $Horde: vacation/config/conf.xml,v 1.15.2.8 2006/10/13 16:03:33 jan Exp $
$conf['vacation']['path'] = '/usr/bin/vacation';
$conf['vacation']['default'] = 'Subject: ' . _("On vacation message") . 
"\n" . _
("I'm on vacation and will not be reading my mail for a while.") . "\n" 
. _("You
r mail will be dealt with when I return.") . "\n";;
$conf['vacation']['subject'] = true;
$conf['vacation']['from'] = true;
$conf['server']['params']['default']['table'] = 'users';
$conf['server']['params']['default']['user_col'] = 'user';
$conf['server']['params']['default']['pass_col'] = 'password';
$conf['server']['params']['default']['message'] = 'vacation_sub';
$conf['server']['params']['default']['subject'] = 'vacation_sub';
$conf['server']['params']['default']['vacation'] = 'vacation';
$conf['server']['params']['default']['driverconfig'] = 'horde';
$conf['server']['params']['default']['hordeauth'] = false;
$conf['server']['params']['encryption'] = 'md5-hex';
$conf['server']['params']['show_encryption'] = false;
$conf['server']['driver'] = 'sql';
$conf['aliases']['show'] = true;
$conf['aliases']['driver'] = 'none';
$conf['user']['refused'] = array('root', 'bin', 'daemon', 'adm', 'lp', 
'shutdown
', 'halt', 'uucp', 'ftp', 'anonymous', 'nobody', 'httpd', 'operator', 
'guest', '
diginext', 'bind', 'cyrus', 'courier', 'games', 'kmem', 'mailnull', 
'man', 'mysq
l', 'news', 'postfix', 'sshd', 'tty', 'www');
$conf['menu']['apps'] = array();


OS is FreeBSD 6.2 and apache version is 2.0.59

any advice would be appreciated
-a
-- 

-------------
Aaron Macks([email protected])
http://www.wiglaf.org/~aaronm/
My sheep has seven gall bladders, that makes me the King of the Universe!
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