problem with bootsrap modal

[fadedreams]

This tool has a problem with twitter bootsrap modal.
I put this inside a bootsrap modal and it is shown bellow the bootsrap modal I tried to change the z-index property but it does not work.

<div class="modal fade" ...
     <div class="modal-body">
           <input type="text" name="timepicker" class="timepicker" /> 
      </div>
</div>

css

.wickedpicker {
  z-index: 100 ;
...

[fadedreams]

I added position:absolute and it works.