Angular-loading-bar + National flag on Dashboard

I added a national flag on the Main page
and include the angular-loading-bar dependency on my source code
after installing it using bower 
Am having trouble adding an image using css
because in my html codes i willl have to add a division with a class of brand
And my css will look like this

<pre><code>
.brand {
width: 100px;
height: 100px;
border-radius: 50%;
background: url('images/fla.jpg')no-repeate !mportant;
background-size: cover;
}
</code></pre>

but this does not give me the same effect i have when i direcrly include the image on index.html