Block access to sharepoint web services via tmg

hi iam trying to block access to sharepoint web services using tmg like in the article here

I have sharepoint published as normal and have put an additional rule
and altered the paths as suggested in the article below.

http://www.paulgrimley.com/2010/03/blocking-access-to-sharepoint-web.html

However I can still access the web services does anyone have any experience doing this?

thanks

jon