[jQuery] Autocomplete not firing in IE

[jQuery] Autocomplete not firing in IE


I'm using jQuery autocomplete and here's my code:
<script type="text/javascript" src="js/jquery-1.2.6.js"></script>
<script type="text/javascript" src="js/jquery.autocomplete.js"></
script>
<script type="text/javascript">
<!--
$(document).ready(function(){
    $("#txtSearchBox").autocomplete("Autocomplete.aspx",
     {
     maxItemsToShow: 10,
     minChars: 3,
     delay: 40,
     width: 270,
     });
});
//-->
</script>
...
<input type="text" ID="txtSearchBox" value="" />
...
This works fine actually but when I try to put this code in some other
page and start typing, I get no response (no auto-completion, no
suggestion layer).
It's OK in Firefox, Opera and Safari. The problem is only in Internet
Explorer.
I trace it using Firebug. Everything is OK, there is no error.
Do you have any idea?