[kronolith] kronolith/lib/base.php on line 71

[George]

I installed a series of HORDE modules and all of them are working except
Kronolith. I get the following error message:
 
Fatal error: Call to a member function on a non-object in
/usr/local/httpd/htdocs/horde/kronolith/lib/base.php on line 71
 
 
I reviewed everything and check the archives of the list but I couldn't
find an fix for this problem. 
 
Could someone help me please?
 
Thanks,
 
George