I installed SMW extension in my local wiki yesterday and now when i visit a page in my local wiki i get this message "A database query syntax error has occurred. This may indicate a bug in the software. The last attempted database query was: (SQL query hidden) from within function "ShortUrlUtils::encodeTitle". Database returned error "1146: Table 'my_wiki.w1_shorturls' doesn't exist (127.0.0.1)"" Along with the page being displayed untidily. So i tried to fix the problem ,as suggested by people i tried to run "php update.php" Then i got the following error message "A copy of your installation's LocalSettings.php must exist and be readable in the source directory. Use --conf to specify it." I have my LocalSettings.php in the same place where my default index.php is located,earlier i had made some logo changes to my wiki and they were succesfully reflected in my wiki,so the localhost has access to the LocalSettings.php I am working on Ubuntu and have mediawiki 1.20 installed Please Help!!Its Urgent Thanks In Advance