[horde] Unable to load the definition of Turba_Driver_

[Hardik Pandya]

Hello,
I've the environment as below for installation of Horde/IMP webmail on RedHat linux box.

Presently while using "Advanced search" option of Address Book, i m getting error says:
-------------------------------------------------------------------------------
A fatal error has occurred:
Unable to load the definition of Turba_Driver_.
[line 44 of /var/www/horde/turba/lib/Driver.php]
Details have been logged for the administrator.
-------------------------------------------------------------------------------


Also if i Add a new contact it says:
-------------------------------------------------------------------------------
      There are no writeable address books.  
      None of the available address books are configured to allow you to add new entries to them. If you believe this is an error, please contact your system administrator. 

-------------------------------------------------------------------------------

Any help on this will be appreciable.

rgds,

Hardik Pandya
GNFC India
Horde Versions
  a.. Horde: 2.2.3 
  b.. IMP: 3.2 (run IMP tests) 
  c.. Turba: 1.2.1 
  d.. Kronolith: 1.1 
  e.. Mnemo: 1.0 
  f.. Nag: 1.0 
  g.. Nic: 0.0.1 
  h.. Jonah: 0.0.2 (run Jonah tests) 
  i.. Troll: 0.0.1 
PHP Version
  a.. View phpinfo() screen 
  b.. PHP Version: 4.3.3 
  c.. PHP Major Version: 4.3 
  d.. PHP Minor Version: 3 
  e.. PHP Version Classification: release 
  f.. You are running a supported version of PHP.