I have two main div's rightDIV and leftDIV, in the leftDIV I have a Listbox control that list categories,

when user click a category I make an AJAX call to server, get the images and start cycle using cycle2.

This works fine. 

When I select a different category I get an error saying -

  "JavaScript runtime error: Unable to get property 'slideCount' of undefined or null reference"

Any idea why ?