Asterisk and VoiceOne ADON-Error

i try to run asterisk on debian sarge with voiceone (of cource with the requierd releas-level).
I followed the instructions from the quick-install guide ( Unfortenetly, i don’t manage to log on the system, because of the following error.

My error message is:
"Missing file:

Fatal error:
ADONewConnection error: [-998 could not load the database driver for"] in ADONewConnection(,) in
/var/www/voiceone_webservices/lib/adodb/ "

The problem is, that I don’t have a file called: “” on my system…

Has anybody an idee, how i solve this problem ?

The documentation i found during the last month guided me everytime to the problem mentioned befor.

For any idees, thanks in advance