problem with pagination

hello there all,

i am having a problem with pagination. the first page looks right, but when i click a link, it redisplays the same items, and the links at the bottom dissapear.

here is the code

def show_history         @site = Site.find(params[:id])         @history_pages, @site.status_changes = paginate(:status_changes,                             :conditions => ["site_id = ?", @site.id],                             :per_page => 10) end

# in the show_history.rhtml <%= pagination_links(@history_pages) %>

any ideas ?

thanks