找不到存储过程？

namespace Wish.GoldenPhoenix.DAL.SqlClient
{
    public class SqlUserProvider : UserProvider
    {
        public override Users GetUserByID(int userId)
        {
            using (SqlConnection cn = new SqlConnection(this.ConnectionString))
            {   SqlCommand cmd = new SqlCommand("GetUserByUserID", cn);
                cmd.CommandType = CommandType.StoredProcedure;
                cmd.Parameters.AddWithValue("@userid", userId);                cn.Open();
                Users user = null;
                IDataReader dr = ExecuteReader(cmd);
                
                while (dr.Read())
                {
                    user = new Users();
                    user.UserId = userId;
                    user.Username = dr.GetString(1);
                    user.Nickname = dr.GetString(2);
                    user.Email = dr.GetString(4);
                    user.Sex = dr.GetString(7);
                    user.ShowEmail = dr.GetBoolean(8);
                    user.RegisterDate = dr.GetDateTime(dr.GetOrdinal("RegeditDate"));
                    user.Signature = dr.GetString(9);
                    user.ImageUrl = dr.GetString(10);
                    int no = dr.GetByte(15);
                    switch (no)
                    {
                        case 9: user.Type = UserType.Admin; break;
                        case 1: user.Type = UserType.Moderator; break;
                        default: user.Type = UserType.Normal; break;
                    }
                }
                 return user;
            }
        }        public override int GetUserIdByUsername(string name)
        {
            using (SqlConnection cn = new SqlConnection(this.ConnectionString))
            {
                SqlCommand cmd = new SqlCommand("GetUserIdByUsername", cn);
                cmd.CommandType = CommandType.StoredProcedure;
                cmd.Parameters.AddWithValue("@username", name);
                cn.Open();
                return Convert.ToInt32(cmd.ExecuteScalar());
            }
        }
        public override int InsertUser(Users theUser)
        {
            using (SqlConnection cn = new SqlConnection(this.ConnectionString))
            {
                SqlCommand cmd = new SqlCommand("InsertUser", cn);
                cmd.CommandType = CommandType.StoredProcedure;
                cmd.Parameters.AddWithValue("@Username", theUser.Username);
                cmd.Parameters.AddWithValue("@NickName", theUser.Nickname);
                cmd.Parameters.AddWithValue("@Password", theUser.Password);
                cmd.Parameters.AddWithValue("@Email", theUser.Email);
                cmd.Parameters.AddWithValue("@Question", theUser.Question);
                cmd.Parameters.AddWithValue("@Answer", theUser.Answer);
                cmd.Parameters.AddWithValue("@Sex", theUser.Sex);
                cmd.Parameters.AddWithValue("@ShowEmail", theUser.ShowEmail);
                cmd.Parameters.AddWithValue("@Signature", theUser.Signature);
                cmd.Parameters.AddWithValue("@ImageUrl", theUser.ImageUrl);
                cmd.Parameters.Add("@UserId", SqlDbType.Int).Direction = ParameterDirection.Output;
                cn.Open();
                int result = ExecuteNonQuery(cmd);
                return (int)cmd.Parameters["@UserId"].Value;
            }
        }        public override String GetUserNameByUserId(int userID)
        {
            string name = string.Empty;
            using (SqlConnection cn = new SqlConnection(this.ConnectionString))
            {
                SqlCommand cmd = new SqlCommand("GetUserNameByUserId", cn);
                cmd.CommandType = CommandType.StoredProcedure;
                cmd.Parameters.AddWithValue("@UserID",userID);
                cn.Open();
                SqlDataReader dr = cmd.ExecuteReader(CommandBehavior.CloseConnection);
                while (dr.Read())
                {
                    name = dr.GetString(dr.GetOrdinal("UserName"));
                }
                return name;
            }
        }        public override bool ValidateEmail(string email)
        {
            using (SqlConnection cn = new SqlConnection(this.ConnectionString))
            {
                SqlCommand cmd = new SqlCommand("GetUserIdByEmail", cn);
                cmd.CommandType = CommandType.StoredProcedure;
                cmd.Parameters.AddWithValue("@email", email);                cn.Open();
//就是下面这一句
                object o = cmd.ExecuteScalar();                return o != null;
            }
        }         public override List<Users> GetUserList()
        {
            return null;
        }        public override bool DeleteUser(int userId)
        {
            return false;
        }        public override bool UpdateUser(Users theUser)
        {
            using (SqlConnection cn = new SqlConnection(this.ConnectionString))
            {
                SqlCommand cmd = new SqlCommand("UpdateUser", cn);
                cmd.CommandType = CommandType.StoredProcedure;
                cmd.Parameters.AddWithValue("@NickName",theUser.Nickname);
                cmd.Parameters.AddWithValue("@Sex",theUser.Sex);
                cmd.Parameters.AddWithValue("@Email",theUser.Email);
                cmd.Parameters.AddWithValue("@ShowEmail",theUser.ShowEmail);
                cmd.Parameters.AddWithValue("@Signature",theUser.Signature);
                cmd.Parameters.AddWithValue("@ImageUrl",theUser.ImageUrl);
                cmd.Parameters.AddWithValue("@UserID",theUser.UserId);                cn.Open();                int no = cmd.ExecuteNonQuery();                return no > 0;
            }
        }
    }
}