C#在WIN2003上操作Oracle9i错误!

OracleConnection (.NET)
Standard:
"Data Source=Oracle8i;Integrated Security=yes";
This one works only with Oracle 8i release 3 or later
Declare the OracleConnection:C#:
using System.Data.OracleClient;
OracleConnection oOracleConn = new OracleConnection();
oOracleConn.ConnectionString = "my connectionstring";
oOracleConn.Open();