iSlidex wont show any categories

It won’t show the category in the dropdown unless there is a published post in that category. Create the new category, create a post and assign it to that category, go back to the iSlidex configuration screen, click the category selector dropdown, your category should be there. Also, I had to replace TimThumb to get things working right. You can get an updated version of TimThumb here: https://timthumb.googlecode.com/svn/trunk/timthumb.php