why dislay :inline not working (not showing two div parallel)

could you please tell me why display:inline not work .I am trying to show two div parallel or aside (as show in image).

Actually my div coming below the div .I need to show divs adjacently here is my code http://plnkr.co/edit/Ny3wPlMG5F1ZbBtachdN?p=preview

#slideTest{
      margin-top:1em;
      border:1px solid pink;
      width:200px;
      height:100px;

    }
    .slider-pager{
      border:1px solid red;

    }

    #contendText{
      border:1px solid brown;
    }
    #rightContainer{
            display:inline;

    }