About An Error Message Could Not Find Stored Procedure 'dbo.U_Login .

Hi All,I am having an error message when running the program below, the message says " Could not find stored procedure 'dbo.U_Login ". I have tried a inline Sql statement to match if user exists and then redirects to another page but when using a Stored Procedure what I get is the above mentioned error. I am logged onto my PC as Administrator but I don't know why this error appaears. Can anyone help me with this ? I am using SQL Server Express with Visual Studio. here the application I am trying to run:1 using System;
2 using System.Data.SqlClient;
3 using System.Data;
4 using System.Configuration;
5 using System.Web;
6 using System.Web.Security;
7 using System.Web.UI;
8 using System.Web.UI.WebControls;
9 using System.Web.UI.WebControls.WebParts;
10 using System.Web.UI.HtmlControls;
11
12
13 public partial class _Default : System.Web.UI.Page
14 {
15 protected void Page_Load(object sender, EventArgs e)
16 {
17
18 }
19 protected void btnSubmit_Click(object sender, EventArgs e)
20 {
21
22 //SqlDataSource LoginDataSource = new SqlDataSource();
23 //LoginDataSource.ConnectionString =
24 // ConfigurationManager.ConnectionStrings["LoginConnectionString"].ConnectionString;
25 ////ConfigurationManager.ConnectionStrings["LoginConnectionString"].ToString();
26 ////// if (LoginDataSource != null)
27 //// // Response.Redirect("DebugPage.aspx");
28
29 //Sql connection = LoginDataSource.ConnectionString;
30
31 string UserName = txtUserName.Text;
32 string Password = txtPassword.Text;
33
34 // string query = "SELECT * FROM Users WHERE userName = @UserName " + "AND Password = @Password";
35 //SqlCommand Command = new SqlCommand(query, new SqlConnection(GetConnectionString()));
36
37 SqlCommand Command = new SqlCommand("dbo.U_Login", new SqlConnection(GetConnectionString()));
38
39
40 //SqlConnection SqlConnection1 = new SqlConnection(GetConnectionString()); //added
41 //SqlCommand Command = new SqlCommand(); //added
42 //Command.Connection = SqlConnection1; //added
43 // Command.Connection = new SqlConnection(GetConnectionString());
44 //SqlConnection_1.Open();//added
45
46 Command.CommandType = CommandType.StoredProcedure; //added
47 //Command.CommandText = "dbo.U_Login"; //added
48
49
50
51
52 Command.Parameters.AddWithValue("@UserName", UserName);
53
54 Command.Parameters.AddWithValue("@Password", Password);
55
56 Command.Connection.Open();
57
58 SqlDataReader reader;
59
60
61 //reader = Command.ExecuteReader(CommandBehavior.CloseConnection);11
62
63 reader = Command.ExecuteReader();
64
65
66 if (reader.Read())
67
68 Response.Redirect("DebugPage.aspx");
69 else
70 Response.Write("user doesn't exist");
71
72
73 //SqlConnection_1.Close();//added
74
75
76 }
77 private static string GetConnectionString()
78 {
79
80 return ConfigurationManager.ConnectionStrings["LoginConnectionString"].ConnectionString;
81
82 }
83
84
85 }
86
87
88
89


 Thanks in advance