I have been asked this question time and time again, how come the LightBox effect isn't working on my site?
First off before you try anything else, switch to the TwentyTen theme and disable all other plugins except CataBlog. If the LightBox now works you know there is an error either in your theme or with a conflicting plugin. You may now enable all your plugins one at a time, checking as you enable each one to make sure the LightBox still works. If a plugin stops the LightBox from working it will not work with CataBlog.
If no plugins are conflicting then it is most likely your theme code. Switch to your theme and check if the LightBox breaks, if so you now know your problem. You need to check your theme's header and footer code. This code can be placed in any of the theme's PHP files but most likely will be placed in the header.php and footer.php files in your theme directory. Make sure that both <?php wp_head(); ?> and <?php wp_footer(); ?> are being called.
<?php wp_head(); ?> should be placed the line before the end head tag, </head>.
<?php wp_footer(); ?> should be placed the line before the end body tag, </body>.
Make sure both PHP function calls are in the appropriate place of your theme code and reload the page, the LightBox effect should now work.