Problem med gæstebog

Jeg har hentet et gæstebogs script på netcoders, og det har virket fint indtil d. 12/7, men nu kan man ikke lægge nyheder ind længere, jeg får følgende fejl:

Microsoft OLE DB Provider for ODBC Drivers error '80040e14'

[Microsoft][ODBC Microsoft Access Driver] Syntax error in INSERT INTO statement.

/gaest/guestbook.asp, line 17

Her er scriptet:
<%
   
    dim conn
   
    function OpenConn( DBName )

        Set Conn = Server.CreateObject("ADODB.Connection")
        ODBCpath = left(request.servervariables("PATH_TRANSLATED"), instrrev(request.servervariables("PATH_TRANSLATED"), "\"))
        Conn.Open "DBQ=" & ODBCpath & DBName & ";DefaultDir=" & ODBCpath & ";Driver={Microsoft Access Driver (*.mdb)}"

    end function

    OpenConn("../gaest/guestbook.mdb")
   
    if request ("mode") = "opret" then
        SQL = "insert into guestbook (guest_name, comments, from_where, email) values ('" & request("guest_name") & "', '" & request("comments") & "', " & request("from_where") & ", '" & request("email") & "'  )"
        Conn.execute( SQL )
        Besked = "<br><h3>Dine kommentare er modtaget!</h3>"
        Besked2 = "Eller klik <a href='viewguest.asp'>her</a> for at se indlægene !<br><br>"
    end if

%>

<html>
<head>
<title>Untitled Document</title>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
<link rel="stylesheet" href="/indhold.css" type="text/css">
<script language="JavaScript">
<!--
function MM_reloadPage(init) {  //reloads the window if Nav4 resized
  if (init==true) with (navigator) {if ((appName=="Netscape")&&(parseInt(appVersion)==4)) {
    document.MM_pgW=innerWidth; document.MM_pgH=innerHeight; onresize=MM_reloadPage; }}
  else if (innerWidth!=document.MM_pgW || innerHeight!=document.MM_pgH) location.reload();
}
MM_reloadPage(true);
// -->
</script>
</head>

<body bgcolor="#FED2A7" text="#000000" background="../images/marie3.gif">
<table width="666" border="0" cellpadding="0" cellspacing="0" height="296">
  <tr>
    <td width="121" height="181"></td>
    <td valign="top" rowspan="4">
      <div align="center">
        <p align="center"><font face="Times New Roman, Times, serif"><b><font face="Verdana, Arial, Helvetica, sans-serif">
          Skriv i Cecilies g&aelig;stebog</font></b></font>
          <% = besked %>
          <% = besked2 %>
          <% if request ("mode") = "" then %>
        <form action="guestbook.asp" name=action>
<input type="hidden" Name="Mode" Value="opret">
<input type="hidden" Name="guest_id" Value="<% = Request("guest_id")%>">
          Navn :
          <INPUT type="text" name=guest_name><br><br>
          E-mail :
          <INPUT type="text" name=email><br><br>
          Skriv hilsen her:
        <br>
<TEXTAREA rows=4 cols=35 name=comments>
</TEXTAREA><br><br>


<br><br>
<input type="Submit" Value="Send" name=Submit1>
<input type="Reset" Value="Slet" name=Reset1><br><br>
</form>

<% End If
' Jesper Lund - jesper@netcoders.dk
%>
        </div>
      </td>
    <td width="44" height="181"></td>
  </tr>
  <tr>
    <td height="114" rowspan="3"></td>
    <td width="44"></td>
  </tr>
  <tr>
    <td width="44"></td>
  </tr>
  <tr>
    <td width="44" height="2"></td>
  </tr>
</table>
</body>
</html>