[jQuery] What is wrong with this code

[joomlafreak]

Hi
this is what I have

jQuery.get(item_link,function(item_content){

        var new_content =
jQuery(item_content).filter("#contentpane .contentpane > p").eq(0);

        jQuery("#myContent").html(new_content).slideDown("slow");
});

What I imagine this code should be doing is extract the first
paragraph from the item_content and fill the #mycontent with this
first paragraph.

But what I get it nothing in this #mycontent.

Can someone please point me to what I am I doing wrong. I intent to
extract the first paragraph from
#contentpane .contentpane element.

thanks