jQuery Tooltip problem

jQuery Tooltip problem

Hi everybody, 
I'm brand new using jQuery... I'm not a newbie with these kinda things, though... I've had experiences with prototype and mootools but I found jQuery better than them, so I'm changing my scripts to make 'em properly working with jQuery.

I'm fighting with the  Bassistance's tooltip plugin though and I really can't understand what's wrong... 

So, the first problem is: my tooltip works fine, but only the second time I pass my mouse on the "object" of my tooltip. Why? How can it be fixed?

My script:


/**** Html ****/
<a class="chop_mouseover" href="javascript:void(0);">My object</a>
    
/**** Script ****/

$(document).ready(function() {
        
       $('.chop_mouseover').bind('mouseenter', mmg_load_tooltip_list);
       
});

function mmg_load_tooltip_list(){
        
      $('.chop_mouseover').tooltip({
            delay: 0,
            track: true,
            bodyHandler: function() { 
                  return $(this).html();
            },
            showURL: false,
            extraClass: 'mmg_default',
            
      });
    
}

So, it's a very simple script as you can see... that's exactly why I don't understand what's not working.

Thank you!

EDIT: I've deleted the second question, cuz it was a stupid thing that I didn't understand in the first place... Sorry