[kronolith] kronolith and multiple user calender

[Jim]

I am working on setting up kronolith for a shared user calender so that
about 30 users can edit this monthly calender but after I installed
kronolith and horde2 

and going to http://localhost/horde2/kronolith/

I get Auth_imap: Required IMAP functions were not found. 



Horde Versions
      * Horde: 2.2.3
      * Kronolith: 1.1

PHP Version
      * View phpinfo() screen
      * PHP Version: 4.3.4
      * PHP Major Version: 4.3
      * PHP Minor Version: 4
      * PHP Version Classification: release