我才学ASP.NET，连接的是Oracle数据库。
为什么提示我无法连接OCI.DLL呢 ？

private void Button1_Click(object sender, System.EventArgs e)
{
OracleConnection myConn = new OracleConnection(System.Configuration.ConfigurationSettings.AppSettings["conString"]);

string strSQL = "select F_USER_ID,F_CODE,F_USER_ALIAS,F_PASSWORD from T_USER";
DataSet dsDataSet = new DataSet();

OracleDataAdapter aa = new OracleDataAdapter(strSQL,myConn);
aa.Fill(dsDataSet,"T_USER");

DataGrid1.DataSource =dsDataSet.Tables["T_USER"].DefaultView;
DataGrid1.DataBind();

}

我的Web.config
<appSettings>
<add key="conString" value="user id=circuit;data source=server;password=dwdl;" />
</appSettings>

各位帮帮!