Mysql和PHP结果可以，但登录不正确

我有mysql连接及其工作。连接完成，mysql结果正常。我试图登录我的面板，但每次都给出"密码不正确"/Kullanıcıadınız veyaşifreniz yanlış。我该怎么解决这个问题？

if(@$_GET['selection'] == 'verification' ) 
    {
        $myusername=$_POST['myusername'];
        $mypassword=$_POST['mypassword'];
        $tbl_name="kullanicilar";
        $myusername = stripslashes($myusername);
        $mypassword = stripslashes($mypassword);
        $myusername = mysql_real_escape_string($myusername);
        $mypassword = mysql_real_escape_string($mypassword);
        $sql="SELECT * FROM kullanicilar WHERE kullaniciadi='$myusername' and sifre='$mypassword'";
        $result=@mysql_query($sql);
        $count=@mysql_num_rows($result);
        if (@mysql_num_rows($result) != 0)
        {
            session_register("myusername");
            session_register("mypassword");
            header("location:index.php?page=giris&lang=tr&selection=verified");
        }
        else 
        {
            echo "Kullanici adiniz veya sifreniz yanlis. <b>$count</b>";
        }
    }