Thread:Project:Support desk/upgrade and DLP/intersection issue

So i've upgrade a very old wiki/db setup to soemthing a bit more current. old system was

Product	Version MediaWiki	1.15.4 PHP	5.3.20 (apache2handler) PostgreSQL	8.1.23

new setup is

Product	Version MediaWiki	1.20.2 PHP	5.3.20 (apache2handler) PostgreSQL	8.4.15

The wiki seems to be installed ok ie it loads and i can view pages and hte search function works but i'm having problems with DPL as most of the wiki is built around dynamic pages. the new wiki just says "No pages meet these criteria." I'm pretty sure i've followed the upgrade instruction correctly, Can anyone shed any light on where i might have gone wrong and how to rectify it? i'm using this dpl code  category = Tools ordermethod=sortkey order=ascending 