[jQuery] trouble with post function

[Althalos]

Hello. I've had this trouble all night and I can fix it.... I am using
the code below and if I take away the arguments I want to pass, then
it works fine and I get a result back from the script. However, when I
try to pass the form values and the slider values (from the UI slider)
to the script the callback function never executes. Anyone know why?

                $("#slider").slider({
                        value:6,
                        min: 1,
                        max: 6,
                        step: 1,
                                change: function(event, ui) {
              $("#environment").val(ui.value);
              var bensinp = $("input[name=bensin]").val();
              var biogasp = $("input[name=biogas]").val();
              var dieselp = $("input[name=diesel]").val();
              var e85p = $("input[name=e85]").val();
              var naturgasp = $("input[name=naturgas]").val();
              var rapsbränslep = $("input[name=rapsbränsle]").val();
              var envv = $("#slider2").slider("value");
              var pric = $("#slider").slider("value");
              $.post("rankfuels.php", {
        bensin : bensinp,
        biogas : biogasp,
        diesel : dieselp,
        e85 : e85p,
        naturgas : naturgasp,
        rapsbränsle : rapsbränslep,
        environment : envv,
        price : pric
        }, function (data) {
        $("#fuelranking").html(data);
        });
      }
                });