ADODB.Recordset.1 error '80004005'

SQLState: S1C00 Native Error Code: 0 [DataDirect][ODBC Oracle Wire Protocol driver]Optional feature not implemented. SQLState: IM006 Native Error Code: 0 [DataDirect][ODBC Oracle Wire Protocol driver]Driver's SQLSetConnectAttr failed. SQLState: 08S01 Native Error Code: 0 [DataDirect][ODBC Oracle Wire Protocol driver]Connection refused. Verify Host Name and Port Number. SQLState: 08001 Native Error Code: -1 [DataDirect][ODBC Oracle Wire Protocol driver][Oracle]ORA-12203: unable to connect to destination

../../Paginas/MCC/mcc_det_procedimiento.asp, line 105