NextGen Gallery : jquery problem

Hi,

I have some problems with NextGen Gallery in the backend.

on overview and other pages , I get the following error

ReferenceError: jQuery is not defined

jQuery(document).ready( function($) {

admin....gallery (ligne 70)
ReferenceError: jQuery is not defined

})(jQuery);

admin....gallery (ligne 611)
ReferenceError: jQuery is not defined

jQuery(document).ready( function($) {

admin....gallery (ligne 502)
ReferenceError: jQuery is not defined

})(jQuery);

According to http://wordpress.org/support/topic/plugin-nextgen-gallery-backend-invisible?replies=6 , the problem is that jquery is included twice, but in my case, can’t see any jquery inclusion.

Any suggestion ? I would like to add it manually but dont know where to put it ?

NextGen Gallery version : 2.0.58