Ion-tabs and content display issue


My tabs in beta 14 are not working with has-header has-subheader…
Do you have any Idea what I should do ?
Thank you.

<ion-nav-bar align-title="left" class="bar-positive">
    <ion-nav-back-button class="button-icon icon ion-ios7-arrow-back"></ion-nav-back-button>

<ion-nav-buttons side="right">
	<a class="button button-icon icon ion-home" href="#/Accueil"></a>

	<!-- <ion-tabs class="tabs-positive tabs-icon-only" delegate-handle="mainScroll"> -->
	<ion-tabs class="tabs-positive tabs-icon-only tabs-icon-top" has-header has-subheader>

	      <ion-tab title="EventBoard" icon-on="icon ion-ios7-paper" icon-off="icon ion-ios7-paper-outline"  on-select="onTabEventsSelected()" has-header has-subheader>
<ion-tabs class="tabs-positive tabs-icon-only tabs-icon-top has-header has-subheader">

has-header and has-subheader are classes.

Thank you @siddhartha even with has-header has-subheader a class it’s not working…
My tab content start behing my navbar…

Just add more margin from the navbar.