标准表达式中数据类型不匹配。 ?

为什么在这个页面就不行 新建了一个页面输入同样的代码就行了呃？？
标准表达式中数据类型不匹配。 
说明: 执行当前 Web 请求期间，出现未处理的异常。请检查堆栈跟踪信息，以了解有关该错误以及代码中导致错误的出处的详细信息。 异常详细信息: System.Data.OleDb.OleDbException: 标准表达式中数据类型不匹配。源错误: 
行 42:         OleDbCommand myCommand2 = new OleDbCommand("select * from ClientInfor where UserName='" + txtName.Text.ToString() + " 'and pwd='" + txtPwd.Text.ToString() + "'", myConnection2);
行 43: 
行 44:         OleDbDataReader oddr2 = myCommand2.ExecuteReader();
行 45: 
行 46:         if (RadioButton1.Checked)
 源文件: d:\我的文档\Visual Studio 2005\WebSites\2009050946\Default.aspx.cs    行: 44 堆栈跟踪: 
[OleDbException (0x80040e07): 标准表达式中数据类型不匹配。]
   System.Data.OleDb.OleDbCommand.ExecuteCommandTextErrorHandling(OleDbHResult hr) +44
   System.Data.OleDb.OleDbCommand.ExecuteCommandTextForSingleResult(tagDBPARAMS dbParams, Object& executeResult) +155
   System.Data.OleDb.OleDbCommand.ExecuteCommandText(Object& executeResult) +190
   System.Data.OleDb.OleDbCommand.ExecuteCommand(CommandBehavior behavior, Object& executeResult) +58
   System.Data.OleDb.OleDbCommand.ExecuteReaderInternal(CommandBehavior behavior, String method) +162
   System.Data.OleDb.OleDbCommand.ExecuteReader(CommandBehavior behavior) +96
   System.Data.OleDb.OleDbCommand.ExecuteReader() +6
   _Default.btnOK_Click(Object sender, EventArgs e) in d:\我的文档\Visual Studio 2005\WebSites\2009050946\Default.aspx.cs:44
   System.Web.UI.WebControls.Button.OnClick(EventArgs e) +78
   System.Web.UI.WebControls.Button.RaisePostBackEvent(String eventArgument) +100
   System.Web.UI.WebControls.Button.System.Web.UI.IPostBackEventHandler.RaisePostBackEvent(String eventArgument) +10
   System.Web.UI.Page.RaisePostBackEvent(IPostBackEventHandler sourceControl, String eventArgument) +13
   System.Web.UI.Page.RaisePostBackEvent(NameValueCollection postData) +36
   System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +2863 
using System;
using System.Data;
using System.Configuration;
using System.Collections;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using System.Data.OleDb;public partial class _Default : System.Web.UI.Page
{
    protected void btnOK_Click(object sender, EventArgs e)
    {
        string strConn = System.Configuration.ConfigurationSettings.AppSettings["ConnStr"].ToString();        OleDbConnection myConnection = new OleDbConnection(strConn);        myConnection.Open();
        string strConn2 = System.Configuration.ConfigurationSettings.AppSettings["ConnStr"].ToString();        OleDbConnection myConnection2 = new OleDbConnection(strConn2);        myConnection2.Open();        OleDbCommand myCommand = new OleDbCommand("select * from UserInfor where UserName='" + txtName.Text.ToString() + " 'and pwd='" + txtPwd.Text.ToString() + "'", myConnection);        OleDbDataReader oddr = myCommand.ExecuteReader();        OleDbCommand myCommand2 = new OleDbCommand("select * from ClientInfor where UserName='" + txtName.Text.ToString() + " 'and pwd='" + txtPwd.Text.ToString() + "'", myConnection2);        OleDbDataReader oddr2 = myCommand2.ExecuteReader();        if (RadioButton1.Checked)
        {
            if (oddr.HasRows)
            {
                oddr.Close();
                myConnection.Close();                Page.ClientScript.RegisterClientScriptBlock(this.GetType(), "sd", "alert('登录成功！')", true);
                //HttpCookie cookies = new HttpCookie("MyCookie");
                //cookies["name"] = txtName.Text.ToString();
                //cookies.Expires = DateTime.Now.AddMinutes(20);
                //Response.Cookies.Add(cookies);                Session["UserName"] = txtName.Text.ToString();                Response.Redirect("Loged.aspx");
            }
            else
            {
                oddr.Close();
                myConnection.Close();                Page.ClientScript.RegisterClientScriptBlock(this.GetType(), "sd", "alert('用户名或密码错误！')", true);                txtName.Text = "";
                txtPwd.Text = "";            }
        }
        if (RadioButton2.Checked)
        {
            if (oddr2.HasRows)
            {
                oddr2.Close();
                myConnection2.Close();                Page.ClientScript.RegisterClientScriptBlock(this.GetType(), "sd", "alert('登录成功！')", true);
                //HttpCookie cookies = new HttpCookie("MyCookie");
                //cookies["name"] = txtName.Text.ToString();
                //cookies.Expires = DateTime.Now.AddMinutes(20);
                //Response.Cookies.Add(cookies);                Session["UserName"] = txtName.Text.ToString();                Response.Redirect("Loged.aspx");
            }
            else
            {
                oddr.Close();
                myConnection.Close();                Page.ClientScript.RegisterClientScriptBlock(this.GetType(), "sd", "alert('用户名或密码错误！')", true);                txtName.Text = "";
                txtPwd.Text = "";            }
        }
    }
    protected void btnCancel_Click(object sender, EventArgs e)
    {    }
}