关于oralce数据库client端连接问题？

[virtualboy]

在interDev中(VBScript)
set rs = server.CreateObject("ADODB.RecordSet")
rs.Open "select * from test","DSN=otest;UID=user2;PWD=pass2" ,adOpenDynamic ,adLockOptimistic

在执行rs.open行时
Microsoft OLE DB Provider for ODBC Drivers (0x80004005)
[Oracle][ODBC][Ora]ORA-12638: 資格証明的取出失败！

可是数据源otest通过oracle自带的工具检测是通的。

请问？？？？？？？？？？？

[playyuer]

connectionstring:
"Provider=MSDAORA.1;User ID=scott;Password=tiger;server=NameOfSQLNet;Persist Security Info=False"

OR:

"Provider=OraOLEDB.Oracle.1;User ID=scott;Password=tiger;server=NameOfSQLNet;Persist Security Info=False"