[kronolith] Kronolith Error, Please Help.

[Bryan]

I installed kronolith in my Horde/IMP framework.  However I'm haveing a problem.
 I used the command "mysql horde < kronolith.sql" to insert the tables into my
sql database for horde.  I checked mysql and the tables are there correctly.  I
edited the "registry.php" file in /horde/config to enable kronolith.  Now, when
I try and bring up Horde in a web browser, I can log in, but then I get a blank
white page.  The buttons for Horde/Mail/Account Maganer/Address
Book/Callendar/Log Out are still at the bottom, and if I click on on for Mail or
Address Book, I will get that to come up.
If I do a "tail /var/log/messages" I get the following: May 17 12:14:28
computerxpress httpd: PHP Fatal error:  Call to undefined function:  iswarning()
in /var/www/html/horde/kronolith/lib/Driver/sql.php on line 64

I'm not sure how to get this fixed?  Any one got any ideas?  I'd greatly
appreciate it.  Thanks.

-Bryan Heusmann
NVETHIS Networks