Customizing OpenStack dashboard - Centos

Hi,

 I was looking into customizing Horizon in my OpenStack cloud. I got information about this from the link - http://docs.openstack.org/grizzly/openstack-compute/install/yum/content/dashboard-custom-brand.html.
 I have successfully installed Havana on Centos and I used Fuel 4.0 to install OpenStack .

 I did the following :
1. I uploaded images to /usr/share/openstack-dashboard/openstack_dashboard/static/dashboard/img
   (I used images of .jpg format ).

2. I uploaded my css stylesheet in /usr/share/openstack-dashboard/static/dashboard/css .

     My css file looks like the following
/*
* New theme colors for dashboard that override the defaults:
* dark blue: #00ffff / rgb(0,255, 255)
* light blue: #7fffd4 / rgb(127, 255,212)
*
* By Preston Lee <email address hidden>
*/
h1.brand {
background: #00ffff repeat-x top left;
border-bottom: 2px solid 7fffd4;
}
h1.brand a {
background: url(../img/my_cloud_logo_small.jpg) top left no-repeat;
}
#splash .login {
background: #00ffff url(../img/my_cloud_logo_medium.jpg) no-repeat center 35px;
}
#splash .login .modal-header {
border-top: 1px solid 7fffd4;
}
.btn-primary {
background-image: none !important;
background-color: #00ffff !important;
border: none !important;
box-shadow: none;
}
.btn-primary:hover,
.btn-primary:active {
border: none;
box-shadow: none;
background-color: 7fffd4 !important;
text-decoration: none;
}

3. I added a line in _stylesheet.html
  <link href='{{ STATIC_URL }}dashboard/css/custom.css' type='text/css' media='screen' rel='stylesheet' />

4.Restarted the apache: sudo service httpd restart

On reloading the dashboard , I am getting an error "Something went wrong, Unexpected error has occured , try refreshing the page" and I am not getting customized dashboard.

Am I missing some steps ? Please help

Thanks
Gowri