I tried by seeing yandex to crawl page, how to stop this?

I have some links which has nofollow but yandex crawl is simply crawling and makes my all script to run.

Please tell me how can i stop this crawling?

Actually, I am redirecting to other site by link and sending mail but i am geting number of mails because of this yandex crawl.

I already used below but its not working.

User-agent: yandex bot
Disallow: /

 

if your host have mod_rewrite, you can use this tutorial http://diveintomark.org/archives/20...pybots_and_tell_unwanted_robots_to_go_to_hell

 

Look here:
http://help.yandex.ru/webmaster/?id=996567

You should write:
User-agent: Yandex
Disallow: /