Thread:Project talk:Support desk/Comments Extension Database error

I have installed Comments extension http://www.mediawiki.org/wiki/Extension:Comments ,i am using 1.21.2 version of mediawiki, i have updated the wiki ,when i have checked Special:Version it is there ,but when i have added to the end of the page ,it is showing this error Database error 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 "Comment::getCommentList". Database returned error "1146: Table 'lriwiki.lriComments' doesn't exist (lriwiki.db.5278410.hostedresource.com)".

please help me with a slution,i have been stuck with this for 3 days, googling a lot