From RNWiki
Some blocks/themes/modules no longer work with v2.30.00
You are using v-e-r-y old code.
Look in mainfile.php and at or around line 218 and you should see this block of code. Read the comments and make a decision as to which way you want to go. We recommend updating your code to use the $db logic instead but the choice is yours, at least for this release :)
/* * The following two lines of code were moved and commented out in RN 2.30.00 to "test the waters" on * finding out what old modules/blocks/hacks/etc. are still using this SQL layer that is so * old it should be obsoleted/removed. If you really need these, uncomment them. We will keep this * code this way for one more major release as well as keep the includes/sql_layer.php script. */ //@require_once(INCLUDE_PATH.'includes/sql_layer.php'); //$dbi = sql_connect($dbhost, $dbuname, $dbpass, $dbname);