[SOLVED] Lightbox or Shadowbox not working

On many posts with images they are only displayed as a thumbnail, when the image is clicked I would like the whole image to be displayed. In the past I used Lighbox or Shadowbox, currently with this theme neither of them work.

Is there a way to get them to work, can't seem to find the solution in these forums and I am stunned no one else has had this problem.

Or is there an option in the theme options to do this automatically that I have missed?

Thanks for your hopeful help.