I have installed 3 clones of smart section provided by smart factory (guide, knowledge and products). All were working fine, but today knowledge module is showing a big problem, when ever I click a link it says "XOOPS root path not defined" admin side is working correctly and even the displayed lists of articles etc. are also ok, every thing is OK, but whenever I click a link it shows a blank page with that message. Can anyone help me on this??