jQuery ile veri post ederken hata

<div class="alert alert-success bildirim" role="alert" style="display: none;"></div>
				<form action="" method="post" class="benimformum"> 
    <span class="input input--chisato"> 
        <input class="input__field input__field--chisato" name="Name" type="text" id="input-13" placeholder=" " required="" /> 
        <label class="input__label input__label--chisato" for="input-13"> 
            <span class="input__label-content input__label-content--chisato" data-content="<?php print $dil["isim"];?>"><?php print $dil["isim"];?></span> 
        </label> 
    </span> 
    <span class="input input--chisato"> 
        <input class="input__field input__field--chisato" name="Email" type="email" id="input-14" placeholder=" " required="" /> 
        <label class="input__label input__label--chisato" for="input-14"> 
            <span class="input__label-content input__label-content--chisato" data-content="<?php print $dil["email"];?>"><?php print $dil["email"];?></span> 
        </label> 
    </span> 
    <span class="input input--chisato"> 
        <input class="input__field input__field--chisato" name="Firma" type="text" id="input-15" placeholder=" " required="" /> 
        <label class="input__label input__label--chisato" for="input-15"> 
            <span class="input__label-content input__label-content--chisato" data-content="<?php print $dil["firmaniz"];?>"><?php print $dil["firmaniz"];?></span> 
        </label> 
    </span> 
    <span class="input input--chisato"> 
        <input class="input__field input__field--chisato" name="Telefon" type="text" id="input-16" placeholder=" " required="" /> 
        <label class="input__label input__label--chisato" for="input-16"> 
            <span class="input__label-content input__label-content--chisato" data-content="<?php print $dil["telefon"];?>"><?php print $dil["telefon"];?></span> 
        </label> 
    </span> 
    <span class="input input--chisato"> 
        <input class="input__field input__field--chisato" name="Gsm" type="text" id="input-17" placeholder=" " required="" /> 
        <label class="input__label input__label--chisato" for="input-17"> 
            <span class="input__label-content input__label-content--chisato" data-content="<?php print $dil["gsm"];?>"><?php print $dil["gsm"];?></span> 
        </label> 
    </span> 
    <span class="input input--chisato"> 
        <input class="input__field input__field--chisato" name="Fax" type="text" id="input-18" placeholder=" " required="" /> 
        <label class="input__label input__label--chisato" for="input-18"> 
            <span class="input__label-content input__label-content--chisato" data-content="<?php print $dil["fax"];?>"><?php print $dil["fax"];?></span> 
        </label> 
    </span> 
    <textarea name="Message" placeholder="<?php print $dil["mesaj"];?>" required=""></textarea> 
    <input type="submit" class="gonderbutonu" value="<?php print $dil["gonder"];?>"> 
</form>

          <?php 
if ($_POST) { 
    $adiniz =  $_POST["Name"] ;  
    $email = $_POST["Email"] ;  
    $firma = $_POST["Firma"] ;  
    $telefon = $_POST["Telefon"] ;  
    $gsm = $_POST["Gsm"] ;  
    $faks = $_POST["Fax"] ;  
    $mesaj = $_POST["Message"] ;  
    $date = date('d.m.Y H:i') ;  
     
    include ("inc/config.php"); 
    $veritabaninakayitet = mysql_query("INSERT into iletisimmesajlari_tb (isim,firmadi,telefon,faks,gsm,eposta,mesaj,okundu,cevaplandi,date) values ('$adiniz','$firma','$telefon','$faks','$gsm','$email','$mesaj','1','1','$date')");  
    echo "Mesajınız tarafımıza ulaşmıştır. En kısa sürede dönüş yapılacaktır."; 
} 
?>

$(document).ready(function() { 
    $(".gonderbutonu").click(function() { 
        var benimformum = $(".benimformum").serialize(); 

        $.ajax({ 
            url:'iletisimfc.php', 
            type:'POST', 
            data:benimformum, 
            success: function(sonuc){ 
   $(".benimformum").remove(); 
   $(".bildirim").text(sonuc); 
   $(".bildirim").css("display", "block"); 
} 
        }); 

                return false; 
    }); 
});