for me it is showing just a blank space..nothing more than that..please suggest me some advice.. thanks
This is the main thing and a good one practice which Chitika has done that it shows ads to users who land on your website/blog using search results from the search engine. In clear words, these ads are mostly targeted on users from US or Canada region. So use Chitika only if you have traffic from US or Canada region.
There might be some technical problem or you have been banned from chitika. You should contact their technical support so that you could be able to show your ad.