alomejor te falta los archivos de la libreria segun he leido en el manual
Código HTML:
Ver originalMinimum Install
For developers who want to release a minimal install of ADOdb, you will need:
adodb.inc.php
adodb-lib.inc.php
adodb-time.inc.php
drivers/adodb-$database.inc.php
license.txt (for legal reasons)
adodb-php4.inc.php
adodb-iterator.inc.php (php5 functionality)
Optional:
adodb-error.inc.php and lang/adodb-$lang.inc.php (if you use MetaError())
adodb-csvlib.inc.php (if you use cached recordsets - CacheExecute(), etc)
adodb-exceptions.inc.php and adodb-errorhandler.inc.php (if you use adodb error handler or php5 exceptions).
adodb-active-record.inc.php if you use Active Records.
Code Initialization Examples
When running ADOdb, at least two files are loaded. First is adodb/adodb.inc.php, which contains all functions used by all database classes. The code specific to a particular database is in the adodb/driver/adodb-????.inc.php file.
For example, to connect to a mysql database:
include('/path/to/set/here/adodb.inc.php');
$conn = &ADONewConnection('mysql');
de lo contrario no funcionara