jQuery Autocomplete กับ space ครับ มันไม่ query ให้

$("#txt-start").autocomplete({
        source: "/get.php?term="+$("#txt-start").val(),
        minLength: 1,
        matchContains: true,
        multiple: true,
        multipleSeparator: "", 
        scroll: true,
        mustMatch: true,
        selectFirst: false,
        maxLength: 200,
        highlightItem: true,
        focus: function(event, ui) {
            $("#txt-start").val(ui.item.label);
            return false;
        },
        select: function(event, ui) {
            $("#txt-start").val(ui.item.label);
            $("#txt-start-val").val(ui.item.value);
            return false;
        }
    });