when i click on add to panel no popup windows appear to display some information

[debianlam]

Hi ,
i installed  joomla 2.5  virtuemart 2   so i have done all a necessary configuration such as add categories , products ..
in first , all works  well  but after that  i found  that when you click on add to panel no windows appear  ,so by a consol of firebug  i could to get this error
TypeError:$.facebox id undefined
$.facebox.settings.closeImage = closeImage;

i could not understand what means this error
could any one help me to solve it
best regards

[jenkinhill]

http://forum.virtuemart.net/index.php?topic=79799