Gif image is not showing up in Twitter Bootstrap modal box in Chrome

[appoingok]

I am trying to put gif image( loader ) in Twitter Bootstrap modal box.It is showing up in Firefox but not in Google Chrome. Please help me out Here is my HTML \[code\]<div id="myModal" class="modal hide holiday_box" tabindex="-1" role="dialog" aria-labelledby="myModalLabel" aria-hidden="true" style="left: 50%;width: 580px;height: 170px;margin: -85px 0px 0px -290px;padding: 20px;"> \[/code\] And CSS\[code\]<div style='display:block;margin:25px auto;width:188px;height:60px;background-image: url(images/ajax-loader.gif);'></div>\[/code\]