192.168.30.23:1521: Connection error to server '192.168.30.23:1521' with user 'vtiger'

(oci8): SELECT name from tab where presence = 0 order by tabsequence  
:
      ADOConnection._Execute(SELECT name from tab where presence = 0 order by tabsequence, false) % line  755, file: adodb-oci8.inc.php
   ADODB_oci8.Execute(SELECT name from tab where presence = 0 order by tabsequence) % line  234, file: PearDatabase.php
PearDatabase.query(SELECT name from tab where presence = 0 order by tabsequence) % line   36, file: TabMenu.php
TabMenu.getTabNames() % line  563, file: index.php
Query Failed:SELECT name from tab where presence = 0 order by tabsequence::ADODB error Query Failed:SELECT name from tab where presence = 0 order by tabsequence::->