Embedding jQuery slider in Bootstrap popover

I'm trying to put this code to work in rails:

$(elem).popover({
  title:"Brake activity",
  content: $("<div>").append( $("#slider").slider({ 
    range: "max",
    max: maxValue,
    min: maxValue / 5,
    value: maxValue / 2}) ).eq(0).outerHTML(),
  trigger: "manual"});

Almost everything goes fine, but the slider does no work -- it seems to be disabled. Even if I define the option disabled to false, I got the same result. The method outerHTML() was extracted from Get selected element's outer HTML.

I uploaded a screenshot showing how the slider appears: http://i48.tinypic.com/24azpkm.png