i really got tired , please someone help me here :(

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C#

hi , i am in needed in Helping very much .... from morning till now(night) i 'm working on c# login through access 2007 ... i explore alot google any websites u know but none of them doesnt reply ... please help meeee ..... i really got tired!

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.Data.OleDb;

namespace WindowsFormsApplication34
{
    public partial class Form1 : Form
    {
        public OleDbConnection con = new OleDbConnection();
        public Form1()
        {
            InitializeComponent();
            string strcon = "Provider=Microsoft.ACE.OLEDB.12.0; Data Source=C:\\Users\\Persian\\Desktop\\a.accdb ";
            con = new OleDbConnection(strcon);
            try
            {
                con.Open();
            }
            catch (OleDbException e)
            {
                MessageBox.Show("Access Error");
                MessageBox.Show("Error code= " + e.ErrorCode);
                MessageBox.Show("Error Message=" + e.Message);

            }
            catch (InvalidOperationException e)
            {
                MessageBox.Show("Invalid message"+ e.Message);
            }
            if (con.State != ConnectionState.Open)
            {
                MessageBox.Show("Database connection is failed");
                Application.Exit();
            
            }
        }

        private void Form1_Load(object sender, EventArgs e)
        {

        }

        private void button1_Click(object sender, EventArgs e)
        {
            string cmdstring = "SELECT * FROM log";
            cmdstring += "WHERE (user=@p) AND (pass=@q)";
            OleDbDataAdapter logindataadapter = new OleDbDataAdapter();
            DataTable accdatatable = new DataTable();
            OleDbCommand acccommand = new OleDbCommand();
            Form1 a = new Form1();
            acccommand.Connection = con;
            acccommand.CommandType = CommandType.Text;
            acccommand.CommandText = cmdstring;
            acccommand.Parameters.Add("@p",OleDbType.Char).Value = textBox1.Text;
            acccommand.Parameters.Add("@q", OleDbType.Char).Value = textBox2.Text;
            logindataadapter.SelectCommand = acccommand;
            logindataadapter.Fill(accdatatable);
            if (accdatatable.Rows.Count > 0)
            {
                MessageBox.Show("Login susseful");
                a.Show();
                this.Hide();

            }
            else
                MessageBox.Show("No Matched username/password found");
            accdatatable.Dispose();
            acccommand.Dispose();
            logindataadapter.Dispose();
        }
    }
}

acctually it runs but when i enter right user and pass on this line

logindataadapter.Fill(accdatatable);

is saying this error "syntax error in FROM clause" ... what is its problem friends

many thanks