Re : Require_once?
adonewconnection() is defined in adodb.inc.php so it looks like you have the same problem.
this file is in tiki/lib/adodb which directory is declared as include path in tiki-db.php (TikiInit::prependIncludePath('lib/adodb');). Are you sure you don,t have safe mode restrictions too?
;){kind=link}
;){kind=link}