i install
http://forums.pligg.com/downloads.php?do=file&id=104 plig 9.9.0 successful. after that i follow the instructions
1. Upload the included files to your pligg root folder.
2. Goto you administration section and set the template name to "coolwater".
3. clear your templates_c and /cache folders.
and i get this on my screen
view
Screenshot
where i make mistake