With the new update of Google algorithm called Penguin, I think my site was being penalized due to webspam. But of course I don't create post which seems to be spam to Google. It is just I think how Google index my site.

I found out that Google index the URL of my site like:

http://www.example.com/comment/reply/3866/26556

So there are so many comment/reply URL index by Google. I have already added:

Disallow: /comment/reply/ Disallow: /?q=comment/reply/

but still Google still index this URL.

Any idea how to prevent Google from indexing comments?