Thinking_sphinx set weighting

Hello,

I'm using Sphinx search engine with thinking_sphinx Ruby on Rails plugin to interface with it. I use it as follows:     @topics = Topic.search(@search_phrase,               :sphinx => {:limit => $SEARCH_TOPICS_PAGE_COUNT, :page => @page,:weights => [100,60,20,20,10]},               :per_page => $SEARCH_TOPICS_PAGE_COUNT, :page => @page)

with indexing code in side topic.rb: define_index do     indexes title, description     indexes comment.description, :as => :comment_description     indexes poll.poll_question, :as => :poll_question     indexes categories.name, :as => :category_name

    has created_at,rating_score   end

it works fine except for weighting! I assume it should give title a weight of 100 as it's first description 60 and so on...

When I search it returns good results but it doesn't sort it very well according to weighting! so if I have a keyword that exist in one topics title and another topics comment I want the one with the keyword in the title to show first. I might be setting the weights in wrong way? any ideas?

Thanks,

Tam