WP3.1-RC4 & Jquery Tabs : error

Hi; I use jquery tabs in my custom plugin.
I had it working with wordpress 3; but seems the upgrade broke it.
It tells me
$(".oqp-tabs").tabs() is not a function.
Like if the JS was not properly included.
But I think it is :
this code is located in my file oqp-tabs.js; which is included like this :

<br />
function oqp_single_oqp_post_scripts() {<br />
	wp_enqueue_script('jquery-ui-tabs');<br />
	wp_enqueue_script( 'oqp-post-admin-tabs', oqp_get_theme_url().'/_inc/js/oqp-tabs.js',array('jquery','jquery-ui-tabs'), OQP_VERSION ); //create and handle post tabs<br />
}<br />
add_action('wp_print_scripts','oqp_single_oqp_post_scripts');<br />

So the dependencies (jquery, jquery-ui-tabs) are called.
Any idea ?
Thanks a lot