Content Slider and Tabs not working – 'undefined'

Hi,

I’m trying to add either a content slider or a tabbed section into a page, but I’m having the same issue on both.

When I go into the content slider and edit any of the slides, when I go back to the slider settings page (when you first click on the content slider box), the slides disappear and are replaced by a simple text box that says “undefined”.

So I figured I could use a tabbed section to similar effect…and exactly the same thing happens…the tabs disappear and are replaced by ‘undefined’.

Any ideas as I’d really like to be able to use these features….

Thanks,

Claire