Look i went to mybb templates then headerinclude after i went there i tried adding

[QUOTE]<link href='https://fonts.googleapis.com/css?family=Roboto:300,400,500,700' rel='stylesheet' type='text/css'>[/QUOTE]

But it gives me 406 error code when i click save -.-
My template of headerinclude..
[QUOTE]
<link rel="alternate" type="application/rss+xml" title="{$lang->latest_threads} (RSS 2.0)" href="{$mybb->settings['bburl']}/syndication.php" />
<link rel="alternate" type="application/atom+xml" title="{$lang->latest_threads} (Atom 1.0)" href="{$mybb->settings['bburl']}/syndication.php?type=atom1.0" />
<meta http-equiv="Content-Type" content="text/html; charset={$charset}" />
<meta http-equiv="Content-Script-Type" content="text/javascript" />
<script type="text/javascript" src="{$mybb->asset_url}/jscripts/jquery.js?ver=1804"></script>
<script type="text/javascript" src="{$mybb->asset_url}/jscripts/jquery.plugins.min.js?ver=1804"></script>
<script type="text/javascript" src="{$mybb->asset_url}/jscripts/general.js?ver=1804"></script>
{$stylesheets}
<script type="text/javascript">
    lang.unknown_error = "{$lang->unknown_error}";

    lang.select2_match = "{$lang->select2_match}";
    lang.select2_matches = "{$lang->select2_matches}";
    lang.select2_nomatches = "{$lang->select2_nomatches}";
    lang.select2_inputtooshort_single = "{$lang->select2_inputtooshort_single}";
    lang.select2_inputtooshort_plural = "{$lang->select2_inputtooshort_plural}";
    lang.select2_inputtoolong_single = "{$lang->select2_inputtoolong_single}";
    lang.select2_inputtoolong_plural = "{$lang->select2_inputtoolong_plural}";
    lang.select2_selectiontoobig_single = "{$lang->select2_selectiontoobig_single}";
    lang.select2_selectiontoobig_plural = "{$lang->select2_selectiontoobig_plural}";
    lang.select2_loadmore = "{$lang->select2_loadmore}";
    lang.select2_searching = "{$lang->select2_searching}";

    var cookieDomain = "{$mybb->settings['cookiedomain']}";
    var cookiePath = "{$mybb->settings['cookiepath']}";
    var cookiePrefix = "{$mybb->settings['cookieprefix']}";
    var deleteevent_confirm = "{$lang->deleteevent_confirm}";
    var removeattach_confirm = "{$lang->removeattach_confirm}";
    var loading_text = '{$lang->ajax_loading}';
    var saving_changes = '{$lang->saving_changes}';
    var use_xmlhttprequest = "{$mybb->settings['use_xmlhttprequest']}";
    var my_post_key = "{$mybb->post_code}";
    var rootpath = "{$mybb->settings['bburl']}";
    var imagepath = "{$theme['imgdir']}";
      var yes_confirm = "{$lang->yes}";
    var no_confirm = "{$lang->no}";
    var MyBBEditor = null;
    var spinner_image = "{$theme['imgdir']}/spinner.gif";
    var spinner = "<img src='" + spinner_image +"' alt='' />";
    var modal_zindex = 9999;
</script>
<link href='http://fonts.googleapis.com/css?family=Titillium+Web:400,400italic,700,700italic' rel='stylesheet' type='text/css'>
<link rel="stylesheet" href="//maxcdn.bootstrapcdn.com/font-awesome/4.3.0/css/font-awesome.min.css">
<script>
jQuery(document).ready(function($) {

$('ul.head_menu li')
.mouseenter(function() {
        $(this).children('ul').fadeIn(150);
})
.mouseleave(function() {
        $(this).children('ul').fadeOut(150);
});

});
</script>
[/QUOTE]

I even tried adding thread prefix lol that option i get error 403 forbidden wtf? :s
[QUOTE]
Forbidden
You don't have permission to access /admin/index.php on this server.

Additionally, a 404 Not Found error was encountered while trying to use an ErrorDocument to handle the request.
[/QUOTE]