Authenticating Users With Encryption Of Passwords

BtnLogin_Click()
{ 
string UserId = txtUser.Text.Trim();
Session["UserId"] = UserId;
String Pwd = FormsAuthentication.HashPasswordForStoringInConfigFile(txtPassword.Text.Trim(),"MD5");
{
            SqlConnection cnn = new SqlConnection(Conn);
            SqlCommand cmd = new SqlCommand("spGetUsers", cnn);
            cmd.CommandType = CommandType.StoredProcedure;
            cmd.Parameters.AddWithValue("@UserId", UserId);
            cmd.Parameters.AddWithValue("@Pwd", Pwd);        
            SqlDataAdapter ada = new SqlDataAdapter(cmd);
            DataSet ds = new DataSet();
            ada.Fill(ds);
           if (ds.Tables[0].Rows.Count >0)
            {
                 if(Pwd==ds.Tables[0].Rows[0]["Password"].ToString());
                {
                 Response.Redirect("Home.aspx");
                }
                    else
                {
                 Response.Redirect("Loginaspx");
                }
            }
}