Q:

Google Tag manager unable to block tracking in admin

I have a PageView tracking tag on all pages on my site.
Its triggered on GTM.dom
I am trying to block the tag from firing on /admin pages however when I set up a blocking tag, then it doesn't seem to work.  
Any ideas why?
Here is the configuration: 

Admin trigger:

Gtm Dom

I have taken the site down while I am testing, so would be useful to have it working.  

A:

Use filter instead of exception

