Siparis Sistemimde Şu kod var

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">

<head>
<meta content="text/html; charset=iso-8859-9" http-equiv="Content-Type" />
<meta content="tr" http-equiv="Content-Language" />
<title>Sipariş Onay</title>

<!--#include file="inc_meta.asp"-->
<%if session("login") <> "ok" then 
response.redirect("/")
end if

%>

<link href="main.css" rel="stylesheet" type="text/css" />
</head>

<body>

<div id="d_main">
	<!--#include file="inc_top.asp"-->
	<div id="d_content">
		<div id="page_top">
		</div>
		<div id="page_content">
			<h1><span class="h1_sp">Online Sipariş</span></h1>
			<div id="menu_items">
				<!--#include file="inc_menu.asp"--></div>
			<div class="f_right">
				<div class="header_page">
					Siparişlerim</div>
				<table cellpadding="0" cellspacing="0" style="width: 711px;">
					<tr class="table_header">
						<td class="table_left_hd">&nbsp;</td>
						<td>Ürün Adı</td>
						<td>Ürün İçeriği</td>
						<td width="70">Fiyatı</td>
						<td width="50">Adet</td>
						<td width="75">Tutar</td>
						<td class="table_right_hd">&nbsp;</td>
					</tr>
<%set cart=conn.execute("SELECT sepet_id,sepet_ad,sepet_icerik,sepet_fiyat,sepet_adet from sepet where sepet_sip_id = 0 and sepet_uye_id="&session("uyeid"))
cnt=0
fyt=0
do while not cart.eof
cnt = cnt + 1
fyt=fyt + (cart("sepet_fiyat") * cart("sepet_adet"))%>
					<tr class="table_spacer">
						<td colspan="6"></td>
					</tr>
					<tr class="table_content">
						<td class="table_left_ct">&nbsp;</td>
						<td class="table_name"><%=cart("sepet_ad")%></td>
						<td class="table_desc"><%=cart("sepet_icerik")%></td>
						<td><%=cart("sepet_fiyat")%> TL</td>
						<td align="center"><%=cart("sepet_adet")%></td>
						<td><%=cart("sepet_fiyat") * cart("sepet_adet")%> TL</td>
						<td class="table_right_ct">&nbsp;</td>
					</tr>
<%cart.movenext
loop%>
				</table>


			</div>
			
			

<div class="f_right"  style="width:711px;margin-top:30px;">
		
		<div class="header_page">Teslimat Bilgileri</div>				
<%	
set adres=conn.execute("SELECT adres.adres_ad, adres.adres_metin, adres.adres_tanim, ilce.ilce_ad,sube.sube_mail FROM (adres INNER JOIN ilce ON adres.adres_ilce_id = ilce.ilce_id) INNER JOIN sube ON ilce.ilce_sube_id = sube.sube_id WHERE (((adres.adres_uye_id)="& session("uyeid") &") AND ((adres.adres_id)="& request.querystring("id") &"))")


%>
<form method="post" action="siparis.asp" id="frm_sip">
<input type="hidden" name="id" value="<%=request.querystring("id")%>" />
	<table style="width: 500px;color:#727272;border: 2px #bddeae solid;	border-radius: 6px;	-moz-border-radius: 6px;font-family: Tahoma;" cellpadding="0" cellspacing="20" >
				
					<tr>
									<td>Alıcı Adı</td>
									<td align="center"><%=session("uyeisim")%></td>
					</tr>
					<tr>
									<td>Alıcı Telefon</td>
									<td align="center"><%=session("uyetel")%></td>
					</tr>

					<tr>
									<td>Adres Adı</td>
									<td align="center"><%=adres("adres_ad")%></td>
					</tr>
					<tr>
									<td>Açık Adres</td>
									<td align="center"><%=adres("adres_metin")%></td>
					</tr>
					<tr>
									<td>Semt</td>
									<td align="center"><%=adres("ilce_ad")%></td>
					</tr>
					<%if adres("adres_tanim") <> "" then%>
					<tr>
									<td>Adres Tanımı</td>
									<td align="center"><%=adres("adres_tanim")%></td>
					</tr>
					<%end if%>
					<tr>
									<td>Toplam Tutar</td>
									<td align="center" style="font-weight:bold;color:#990000;font-size:16px;"><%=fyt%> TL</td>
					</tr>

					<tr>
									<td>Ödeme Şekli</td>
									<td align="right"><select class="input_text" style="padding:5px;" name="odeme">
				<option>Nakit</option>
				<option>Kredi Kartı</option>
				<option>Multinet</option>
				<option>Ticket</option>
				<option>Sodexo</option>
			</select></td>
					</tr>
					
<tr>
									<td>Grupanya Kodu (Varsa)</td>
									<td align="right" style="font-weight:bold;color:#990000;font-size:16px;"><input type="text" id="grp" name="grp" class="input_text" /></td>
					</tr>
					<tr>
									<td></td>
									<td align="right"><a href="javascript:x_kontrol(document.getElementById('grp').value);" class="button">Kontrol Et</a></td>
					</tr>
					
<%if cnt > 0 then %>						
					<tr>
									<td>Sipariş Notu</td>
									<td align="right"><textarea class="input_area" name="snot" cols="20" rows="2"></textarea></td>
					</tr>
<%end if%>					
					<tr><td colspan="2" height="50"><a href="javascript:frm_post('frm_sip',0);" class="button">Siparişi Tamamla</a></td></tr>
	</table>
</form>		




		</div>
			
		</div>
		<div id="page_bottom">
		</div>
	</div>
	<!--#include file="inc_footer.asp"--></div>

</body>

</html>


Buradan Tıklayında Siparis.asp ye Gidiyor ama siparis.asp sayfamda hata Alıyorum
500 - Internal server error.
There is a problem with the resource you are looking for, and it cannot be displayed. hatası alıyorum


Siparis.asp de Aşağıdaki Gibidir...
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta content="text/html; charset=iso-8859-9" http-equiv="Content-Type" />

<title>Form Mail</title>

</head>

<body>
<!--#include file="../func.asp" -->
<%if session("login") <> "ok" then 
response.redirect("/")
end if


if request.form <> "" then

grupanya = 1


if grupanya = 1 and request.form("grp") <> "" then

k=request.form("grp")

Set xml = Server.CreateObject("Microsoft.XMLHTTP")
xml.Open "GET", "http://onay.grupanya.com/s/KodSorgula.ashx?k="&k&"&ci=ps&x=129560", False
xml.Send

sonuc= xml.Responsetext 
Set xml= Nothing

sonuc2= split(sonuc,"|")

sonuc3 = sonuc2(0)

select case sonuc3
case "-1"
sonuc4="Parametreler Eksik veya Hatalı"
case "-2"
sonuc4="Fırsat Kodu Hatalı"
case "-3"
sonuc4="Fırsat Kodu Firmamıza Ait Değil"
case "-4"
sonuc4="Fırsat Kodu " &sonuc2(1)& "Tarihinde İptal Edilmiş"
case "-5"
sonuc4="Fırsat Kodu " &sonuc2(1)& "Tarihinde Kullanılmış"
case "1"
sonuc4="Tebrikler. Fırsat Kodunuz Kullanılabilir Durumda !"

xsnot = "<b>Grupanya Fırsat Kodu: "&k&"</b><br/>"


Set xml2 = Server.CreateObject("Microsoft.XMLHTTP")
xml2.Open "GET", "http://onay.grupanya.com/s/KodDogrula.ashx?k="&k&"&ci=ps&x=129560&km=ps", False
xml2.Send

case else
sonuc4="Bilinmeyen Hata. Tekrar Deneyiniz !"
end select

end if


set adres=conn.execute("SELECT adres.adres_ad, adres.adres_metin, adres.adres_tanim, ilce.ilce_ad,sube.sube_mail FROM (adres INNER JOIN ilce ON adres.adres_ilce_id = ilce.ilce_id) INNER JOIN sube ON ilce.ilce_sube_id = sube.sube_id WHERE (((adres.adres_uye_id)="& session("uyeid") &") AND ((adres.adres_id)="& request.form("id") &"))")

xkey = session.SessionID & month(now) & day(now) & hour(now) & minute(now) & second(now)

Set rs = Server.CreateObject ("ADODB.RecordSet" ) 

rs.Open "Select top 1 * from sip order by sip_id desc",conn,1,3

xsnot = xsnot & request.form("snot")

rs.AddNew
rs("sip_tarih") = now
rs("sip_uye_id") = session("uyeid")
rs("sip_sube_mail") = adres("sube_mail")
rs("sip_alici") = session("uyeisim")
rs("sip_tel") = session("uyetel")
rs("sip_adres") = adres("adres_metin") & " - " & adres("ilce_ad")
rs("sip_tanim") = adres("adres_tanim")
rs("sip_odeme") = request.form("odeme")
rs("sip_not") = xsnot
rs("sip_key") = xkey
sid=rs("sip_id")
rs.Update

set sepet = conn.execute("update sepet set sepet_sip_id ="&sid&" where sepet_uye_id =" & session("uyeid") & " and sepet_sip_id = 0")

mailgonder "hakan@lxxxxxx.com","Hakan12",adres("sube_mail"),"Yeni Sipariş", now & " - Siparisi goruntulemek icin <a target=""_blank"" href=""http://xxxxxxxxx.com/tr/siparislerim.asp?id="&sid&"&key="&xkey&""">buraya tiklayiniz</a>"

end if

%>
  <script language="javascript">
	window.alert('Siparişiniz size en yakın şubemize iletilmiştir. En kısa sürede teslim edilecektir. Teşekkür ederiz.');

	window.location='/';

    </script>

</body>

</html>