Only Categories link dont work!

hi, in the Faq of my template says this:

FAQ:
1) Q: How do I add a featured article at the top of the homepage?
A: To add a article to the top, create a new category and call it “Featured”, take note of the category ID. Edit the file config.php in your shiva/shiva directory and change the featured_cat setting. Assign whichever post you would like featured to that category.

in the config.php says:

<?php

$theme_config = array(
‘featured_cat’ => 6, // Featured category ID
);

?>

_______

anyone knows what i need to do to put there the right think, the ID of category is 40

if i put this correct my web site is alll DONE
please.. when i click in any category appears this error mensage:

Fatal error: Call to undefined function: the_content_limit() in /home/oteusite/public_html/wp-content/themes/ShivaPro/shiva/archive.php on line 31

help me!!!